Truck Pull Guidelines
Cheater Stock 4×4 Rules
Cheater Stock 4×4 Truck Rules
Revised – Jan. 2023
1. Weight class is 6200 pounds. No weight brackets or hanging weights allowed on front of vehicles. Weights must be in cab or bed only and securely fastened or contained safely therein. No weights allowed under hood or in the wheel wells. No weights may be suspended under the body/chassis or behind panels/parts.
2. No dual wheels, studded tires, tire chains, or any tire not specifically intended for street use are permitted. All tires must carry a D.O.T. number on the side wall, D.O.T. number must be easily read from the outside of the tire. No cut, altered, or sharpened tires.
3. Front bumpers must be unaltered factory stock. No weighted front devices are permited – this includes but is not limited to: homemade bumpers, brush guards, and winches. Lower brackets (only) for snow plow frames are permitted so long as no modifications that would add weight are determined. An unaltered decorative brush guard may be permItted at the option of the head official. A truck is permitted to compete without a front bumper.
4. The hitch point will be from a “Reese type” hitch or drawbar with the point of attachment to the truck’s frame behind the pumpkin of the rear end. Hitch point may not be more than 24′′ from ground. No angled, lever, pivot, axis or other types of ‘trick’ hitches are allowed and the hitch must be stationary in all directions. The hitch point from center of axle must be no shorter than 36′′ on regular cab trucks and 48′′ on extended and 4-door cab trucks. Shortening of the bed in order to shorten the hook point is not permitted. Traction bars are allowed.
5. Gasoline is the only fuel permitted. No aluminum engine blocks are permitted unless O.E.M. Absolutely no alcohol, nitrous oxide or other oxygen extenders. Turbo-Blue and CAM-2 are permitted. Headers are allowed. No superchargers or turbochargers permitted. Swaps between manufactures are not permitted. (revised - Jan. 2023)
6. No solid suspensions are permitted. Must have stock suspension one ton or below. Blocks are allowed between axle housing and truck frame. Lift kits are acceptable.
7. Truck must be stock in appearance. Floor in bed must be solid. The wheelbase may not be changed. Wooden flatbeds are permitted.
8. Transmission & transfer case must be O.E.M. and available in one ton (or smaller) pick-up trucks. U-joint shields, driveshaft loops, and kill switch required.
9. Drivers are urged to wear a seatbelt or shoulder harness and a motor sport type helmet when hooked to the sled. Race seats with 5-point harness allowed. Passengers are not permitted in the truck unless first-time puller — limit 3 times.
10. A maximum of 3 working automotive batteries allowed.
11. Protest rule: $500 for hidden weights. This must be done in one hour time limit.
12. Tractor & Truck pullers hitch opening size requirements: 3 ¾ inch front to back and 3 inch side to side. Note: No loose clevis are to be used. (Revised – Dec. 2017)
13. Helmet/seat belt is required.
Modified Stock Truck Rules
Modified Stock 4×4 Gas — 6200 lb.
Revised – Jan. 2023
Hitch: Tractor & Truck pullers hitch opening size requirements: 3 ¾ inch front to back and 3 inch side to side. Note: No loose clevis are to be used. (Revised – Dec. 2017)
1. Racing gasoline only. No power additives of any kind. Absolutely no Nitrous Oxide, alcohol, or Nitro, etc.
2. Engine must be same make of truck. Engine center-line rule: center of axle to bellhousing to be at least 12 inches. Any internal modifications to engine are allowed. Revised – Dec. 2017
3. 472 Cubic inch limit max =/-2%. To be checked with a pump. Must be checked and tagged before 2nd pull. (Revised Dec. 2017)
4. Dry sump oil systems are not allowed.
5. One single carburetor (4150 or equal) no-dominators.
6. Aluminum intakes allowed (cast only). No external modifications. Maximum of 2″ spacer between carb and intake. No tunnel rams or sheet metal intakes. (Clarification - Dec. 2021)
7. After market heads allowed. Must be cast iron block and heads. No aluminum heads or blocks.
8. Open headers allowed. (Revised - Jan. 2023)
9. Must have alternator; alternator must be driven by crank.
10. Electric fuel pumps allowed. One fuel pump total. No belt drive pumps allowed.
11. Electric fans and water pumps are allowed.
12. Front end and rear end no larger than 1 ton.
13. Transmission and transfer case must be OEM style of truck. No Pro-Fabs.
14. Tractor & Truck pullers hitch opening size requirements: 3 ¾ inch front to back and 3 inch side to side. Note: No loose clevis are to be used. (Revised – Dec. 2017)
15. All trucks must be teched and pass inspection and display an AFPA tech sticker for the current pulling season. (New - Dec. 2021)
General Rules
1. Officials have full and final say over all rules.
2. Class is open to all persons 16 years of age or older with a valid driver’s license. Anyone under 18 years of age must have a release and consent form signed by parent or guardian.
3. Officials reserve the right to disqualify any participant that is acting in an unsportsmanlike or unsafe manner. If disqualified, the participant will be subject to removal from the event grounds without refund.
4. Any driver who is suspected to be under the influence of alcohol or drugs will not be allowed to participate.
5. Any questions or concerns should be addressed at the driver’s meeting.
Protest Rules
1. Engine cubic inch protest fee is $300. This fee must be filed at time of protest. The protester is to be checked first. Only top 3 finishers can be protested for engine cubic inch. Engine will be pumped only, no teardowns. If legal, owner of the truck gets $250, and pump operator gets $50. If illegal, protestor gets $250 back and pump operator gets $50. All points and prize money for that pull will be forfeited and protestee barred from pulling at club sanctioned pulls for one year, if truck found to be illegal or refusal of pumping. Only 3 people can be present during pumping.
Safety Rules
1. Must have loops on all drive shafts and U-joint shields. 3 on rear and 2 on front.
2. A working kill switch. Kill switch must be accessible to sled in plain view of sight. Kill switch must shut off fuel pump and ignition.
Revised – Dec. 2017
3. Must have Neutral safety “white” light visible by sled operator.
4. Must have fire extinguisher within hand reach.
5. Blow proof bell housing or blanket and flywheel shields are insurance required.
6. Must wear a helmet. Seat belt is required.
7. NO HOT RODDING IN PIT AREAS.
8. Driver use of a race seat with five point harness recommended.
Body Rules
1. Must have all factory sheet metal. No fiberglass or aluminum body parts (exception fiberglass hood allowed). Hood scoops are allowed. Do not have to have a tailgate on truck.
2. Maximum wheelbase is 135 inches.
3. Full factory stock bed-NO FLATBEDS or aluminum beds.
4. No extended cabs.
5. Inner fenders must be in truck in stock location.
6. Gas tanks must be in factory position or fuel cell only in bed of truck or on weight box. (Revised - Dec. 2021)
7. Must have at least one OEM style shock per wheel. (Clarification - Dec. 2021)
8. Rear brakes an option.
9. One battery must be secured under hood.
10. Stops must be in the center of the axle housing. NO solid suspensions. Springs must have a minimum of 5 working leafs on each side. Springs must be in factory location.
11. Ladder bars may not extend past the front of bed on the rear or past the front cab mount of the front.
12. Maximum of 33x12.50 DOT tires mounted on Maximum 10” wide Rims. No cut or sharpened tires. Allow only 4 tires. (Clarification - Dec. 2021)
13. Front weights may not extend more than 195 inches from center line of rear axle to furthest point.
14. Hitch will be 24″ high maximum. No less than 36″ from center of the rear axle to hook point. Hitch must fasten to frame only and adjust off the frame ONLY. All bracing must hook to frame or stops that come off of frame ONLY. Hitch opening size 3 ¾ inch front to back and 3 in side to side.
8000# 2.5/2.6 Diesel-4×4 Rules
8000# 2.6 Diesel — 4×4
Revised – Jan. 2023
Hitch: Tractor & Truck pullers hitch opening size requirements: 3 ¾ inch front to back and 3 inch side to side. Note: No loose clevis are to be used. (Revised – Dec. 2017)
STREET LEGAL DIESEL CLARIFICATION
Street legal trucks that pull in OPEN DOT class must have an air kill.
Maximum weight 8000#
OEM Chassis is mandatory. The vehicle must retain the full OEM chassis. Wheel tubs, back half conversions, and tube chassis are prohibited. Must retain factory OEM wheelbase for make and model of body, not to exceed 172 inches.
The body must be OEM truck body including the full bed floor. No flatbeds permitted. The body must retain the full sheet metal. After market hoods permitted. The hood must be closed and securely latched when hooked to sled.
Complete engine must have stock appearance except where otherwise noted in these rules. Maximum engine size will be 460Ci. Engine must be in OEM location for the body used. Engine must have a 3/8 diameter cable surrounding the engine block. Cable is to be positioned between #1 and #2 cylinders and is to pass through manifolds. Cable will have 4-6 inches of slack. Two cable clamps at cable splice are required.
Cylinder head must be OEM or OEM replica for brand of engine. Outside of cylinder head must measure factory width and length. No billet heads of any material. Head must retain factory OEM valve angle. No deck plates permitted.
Hook point to be no closer than 44” of centerline of rear axle. Maximum hitch height of 24” with a minimum of 3.75”x3” opening. Hitch must be stationary in all directions. Hitch must be frame mounted. The use of reese style hitch is allowed with reinforcements. Hitch must be centerline of rear axle or behind. Hitch must not exceed 25 degree angle from pivot point to hook point. No hitch supports or adjusters fastened to rear axle housing shall be above center point of rear axle. Pivot pin of drawbar can be no further forward than the centerline of rear axle.
Turbo is limited to a 2.6” inducer bore. Bore must be smooth. No MAP Width Enhancement groove (MWE) allowed. Compressor wheel must protrude into 2.6” bore for 1/8”. Bore will be checked with a 2.605” turbo plug. Plug must not be able to enter inducer bore and contact wheel.
All vehicles must be equipped with upward pointing exhaust located either directly behind the cab or out of the truck hood. Two 3/8 inch diameter bolts must be placed through the exhaust pipe in a cross pattern within one inch of each other and within 12 inches of turbo.
Front hanging weights are allowed, not to exceed 60 inches forward from the centerline of the front axle. Ballast may be added in the bed of the truck, but must be securely fastened. Maximum weight 8000 pounds. Fuel cell/battery allowed in front weight box.
All trucks must have at least six-inch-wide u-joint shield around the rear u-joint constructed of at least 5/16 inch steel or 3/8 aluminum that will safely contain the u-joint and the end of the driveshaft. All shields must be securely mounted to vehicle. Any front shaft u-joints that can be visibly seen from side of truck must be shielded to contain the u-joint and the end of the driveshaft.
A fire extinguisher system is permitted. 2.5 fire extinguisher must be securely mounted within reach of driver. A complete OEM firewall is required.
All drivers must have valid drivers license and full SFI fire suit including helmet. Seatbelt/restraint must be worn.
The complete OEM floor pan is mandatory. Vehicle must maintain a complete firewall. Additional gauges and pillar pods are permitted.
Hand throttles permitted. Diesel fuel only. No propane or N02 or any other oxygen enhancers allowed.
Maximum of one P pump up to P7100 allowed. 13MM plunger limit. Ag governors permitted. The use of multiple high pressure common fuel pumps is legal.
OEM rear and front ends required. Must have come factory in a one ton or smaller vehicle.
Axle shields are required. Shield to be .060” thickness steel or aluminum. A hole may be cut in one shield to allow operation of hub lock.
Safety switch (rain cap or guillotine) must shut off air to diesel engines. Switch will be securely mounted to back of vehicle. A 2 inch or bigger solid ring must be attached to end of switch. Ring must be zip tied to switch bracket. Switch must also be able to be activated in cab while driver is secured in vehicle.
Hydraulic steering permitted.
Suspension: The upper mounting point for strut assembly must be in factory location. Adjustable caster/ camber pillow ball mounts are permitted. The lower control arm may be strengthened provided the factory mounting points are maintained. Strut lower braces, lower tie bars, sway bars, and limit straps are permitted. Traction bars and devices are permitted. Raising or lowering of vehicle height with suspension modifications is permitted, but must be bolt on only. Welds permitted for attachment to frame and axle only. Blocked suspension permitted. No air bags. Rear suspension may be made solid.
Tires must be DOT approved with maximum size of 35x12.50. No studded tires or tire chains. No alterations to tires permitted. No bar or terra tires.
Dual wheels are prohibited.
OEM transmissions and transfer case must be used. Must have come factory in a one ton or smaller vehicle.
Non-OEM transmissions prohibited. After market torque converters, calce bodies, and internal components are permitted.
SFI bell housing and/or SFI blow proof bell housing, or SFI blanket type shield must be used.
Water injection is prohibited.
Air to Air intercooler only. No cooling devices allowed for intercooler. No ice boxes.
8000# Open DOT 4×4 Rules
8000 lb. 3.6 Open DOT 4×4
Revised – Jan. 2020
Hitch: Tractor & Truck pullers hitch opening size requirements: 3 ¾ inch front to back and 3 inch side to side. Note: No loose clevis are to be used. (Revised – Dec. 2017)
1. Engine and chassis must be factory one ton or below or replacement. Engine swaps between manufacturers permitted. Open Driveline Allowed. *class name to be changed to 8000# OPEN DOT (Revised – Jan. 2020).
2. Drawbars allowed.|
3. 26-inch hitch height. Hitch opening size requirements 3¾-inch front to back and 3-inch side to side. Note: No loose clevis are to be used. (Revised – Dec. 2017)
4. DOT tires only with maximum size of 35×12.5 or metric equivalent (Revised – Jan. 2020).
5. Exhaust must exit straight up or straight down. Must have 2 grade 5 3/8 bolts 1/2 inch apart 90 degrees from each other and recommended to be 12 inches from exhaust impeller.
6. Hanging weight allowed nothing to exceed 60″ from center of front axle.
7. Drive shaft loops, u-joint shields, blow proof bellhousing and/or sfi scatter blanket required.
8. Air shut off required.
9. Fire extinguisher required!!!!!!
10. PROTEST RULE: If a truck is protested, the protest must be made to a member of the Tech Committee by a competitor in the same class either before the pull starts or before the truck in question leaves the pulling track. A protest fee of $500 must be paid by the protester, which will go to protestee if the truck is found to be legal. All points and prize money for that pull will be forfeited, protest fee returned to protester, and protestee barred from pulling at club sanctioned pulls for one year if truck found to be illegal or refusal of tear down. This must be done in one hour time limit.
11. Modified street trucks, WITH ALL SAFETY EQUIPMENT, may pull in this class.
12. Track and tech officials’ decisions are final!!!!!!!!
13. No pressurized bottles allowed, including nitrous oxide and propane.
14. Any factory wheelbase truck length 172 inches maximum.
15. Helmet/seat belt is required.
16. Turbo limited to 3.6 smoothbore. Would take effect for the 2021 pulling season. (Revised – Jan. 2020)
8500# Street Diesel Rules
2015 20 M.P.H.
Street Stock Diesel Truck Rules
Revised – Dec. 2017
Hitch: Tractor & Truck pullers hitch opening size requirements: 3 ¾ inch front to back and 3 inch side to side. Note: No loose clevis are to be used. (Revised – Dec. 2017)
This class is to be street vehicles that are allowed traction devices and limited by: no hanging weight, Reese hitch only at 20″ hitch height, and 20 MPH speed limit. Allow traction bars. Revised – Dec. 2017
Weight: 8500 1b
Regulations:
Ballast:
Ballast is permitted. Ballast may be added to the bed of truck. Ballast must be securely mounted in the bed. NO FRONT MOUNTED BALLAST OR WEIGHTS ALLOWED IN CAB, this will be enforced.
Batteries:
The Batteries must be securely mounted and in the factory location.
Body:
The body must be the OEM truck body including the full bed floor. The body must retain full sheet metal. Metal aftermarket hoods are permitted. No fiberglass hoods. The hood must be closed and securely latched while the truck is hooked to the sled. The complete OEM firewall and complete OEM floor pan is mandatory. A factory installed pickup bed or commercial aftermarket flatbed must be installed.
Brakes:
Four wheel hydraulic brakes are mandatory and must be functional.
Chassis:
The OEM chassis is mandatory, The engine must be in the OEM location for the body used. The vehicle must retain the full OEM chassis. Wheel tubs, back half conversions, tube chassis, etc, are prohibited.
Cooling System:
Radiators must be in stock location and be of at least stock size.
Compressed Gases:
Use of any compressed gases (nitrous or propane or any other) is prohibited.
Credentials:
All drivers must have a valid state driver’s license. Vehicle must have current registration and current license plates. And proof of insurance may be required.
Driveline:
An OEM transmission and transfer case are mandatory. They must have been an option on a one ton or smaller pickup.
Driver Restraint System:
The OEM restraint system is mandatory and must be worn.
Engine:
The engine is limited to a stock appearing, OEM compression engine, available from the factory in a one ton or smaller truck.
Exhaust:
All vehicles are recommended to be equipped to direct exhaust upward. The exhaust must exit rearward of the driver’s compartment. Stacks exiting through the hood or fender wells are prohibited.
Fuel:
The fuel must be pump #1, #2 diesel, or Soy/Biodiesel. Off road fuel is prohibited. Must be commercially available fuel.
Fuel Injection pump:
OEM FUEL SYSTEMS with the exception of a lift delivery pump and filters.
Harmonic Balancer:
All engines turning more than 4500 RPM must be equipped with a harmonic balancer or dampener meeting SFI Spec 18.1.
Hitch:
The hitch must be a receiver style hitch, reinforcements are permitted. Reinforcements must not extend forward of the center line of the rear axle. Trick hitches are prohibited. Trick hitches will be determined by the Tech Officials. The hooking point must be the rear most point on the vehicle and must be rearward of the stock location of the tailgate. The hitch must be horizontal to the ground and stationary in all directions. Bumper may be notched or removed. The hitch’s height from the ground may not exceed 20 inches. The hooking point must have a minimum of 3 inch by 3 inch inside opening for the sled hook. The hooking point must be a minimum of 48 inches from the center of the rear axle to the hooking point. The hooking point will be where the hook touches metal. That is the hooking point.
Intercoolers:
Only OEM intercoolers are allowed.
Interior:
A complete factory OEM interior, including dashboard, door panels, headliner, etc. is mandatory. Aftermarket seats are permitted, they must be fully upholstered. All factory controls, lights, windows, Signals, wipers, etc, must be retained and in working order. The uses of hand throttles are prohibited.
Rear End:
Non OEM rear-end housings are prohibited. The rear-end housings must have been for a one ton or smaller pickup Pick up. Rear axle bolts must be covered by a cap or shield.
Steering:
The vehicle must retain the full, original OEM steering gear. The vehicle must retain the original OEM power assistance, if it was so equipped. Additional stabilizers are permitted. Non OEM power assist methods are prohibited.
Street Equipment:
Complete headlight and taillights assemblies (all) are mandatory and must be operative, and must be installed during competition. Complete OEM windshield and all other windows are mandatory. WIndows must be able to operate per factory specifications; they must open and close by electric or mechanical means.
Suspension – Front:
The factory suspension configuration must be retained. The upper mounting point for strut assemblies must be in factory location. Adjustable caster/camber pillow ball mounts are permitted. The lower control arm may be strengthened provided factory mounting points are maintained. The lower mounting point for the strut assembly may be modified for improved caster and camber. Strut tower braces, lower tie bars, sway bars, and limit straps are permitted. Traction bars and devices are permitted. Final decisions rest with the American Farm Pullers Association Tech Department.
Suspension – Rear:
An OEM style suspension is mandatory. Traction bars and devices are NOT permitted. The rear suspension must maintain a minimum compression shock travel of one inch. Compression stops may be adjustable. All rear suspension must use at least one working shock absorber per wheel. Air bag spring assist is prohibited.
Tires:
The tires must be DOT street tires. 35 inch max. Cut tires are prohibited. No chains or studs.
Transfer Case:
Non-OEM transfer cases are prohibited. It must have been an option on a one ton or smaller pick up truck.
Transmission – Automatic:
Non-OEM transmissions are prohibited. Aftermarket torque converters, valve bodies and internal components are permitted. Factory auto shift columns only, No floor shifters. All transmission lines must be metallic or high pressure type hose. All vehicles with engines running 4500 RPM or more and using an automatic transmission must be equipped with a transmission shield meeting SFI Spec 4.1 and must be labeled accordingly. A blanket type shield is permitted. It must be appropriately labeled as meeting SFI Spec 4.1 and it must extend from the rear of the engine block to the front of the tail housing with a minimum of six (6) inch overlap where it is fastened. All non-blanket shields must incorporate two (or one per manufactures instruction) inch by 1/8 inch straps that bolt to the shield on each side and pass under the transmission pan unless the transmission pan is labeled as meeting SFI Spec 4.1. All vehicles with engines running 4500 RPM or more and using an automatic transmission must be equipped with a flex plate meeting SFI Spec 29.1 and be covered by a flex plate shield meeting SFI Spec 30.1.
Transmission – Manual:
Non-OEM transmissions are prohibited. A clutch meeting minimum SFI Spec 1.1 or 2.1 is mandatory on all engines running 4500 RPM or more. All manual transmissions must be clutch assisted. Sequential shifters are prohibited. All vehicles with engines running 4500 RPM or more and equipped with a manual transmission must have a flywheel shield labeled as meeting minimum SFI Spec 6.3 or greater. Applications for which an SFI Spec flywheel shield is not available may use a properly attached SFI 4.1 or 4.2 blankets that completely cover the bell housing. It must be attached to the rear of the engine block and extend rearward to the transmission with a minimum of six (6) inch overlap where it is fastened. All transmissions or clutch pedals will have a safety interlock switch so that vehicle will not start in gear.
Turbocharger:
The vehicle is limited to a stock, unmodified, OEMI Factory charger with factory configuration only.
Water Injection:
Water injection is prohibited. All system components must be removed from truck.
Wheelbase:
The vehicle must retain the original factory wheel base and track width. Cab and chassis trucks may not exceed 172 inches center to center of axles. Front dual-wheel spacers may be used only with accompanying positive-offset dually style wheels.
New Class for 2015, American Farm Pullers Association may change or add rules at anytime and the American Farm Pullers Association tech officials rulings are FINAL.
Pure Street Gas Truck Rules
6200 & 6500 Pure Street Gas Truck Rules Revised - 2024
Hitch: Tractor & Truck pullers hitch opening size requirements: 3 3/4 inch front to back and 3 inch side to side. Note: No loose Clevis are to be used.
Safety Rules
If tech decides you are running a higher RPM or a need for it you may be required to run below proof bell housing or a transmission blanket. Two rear driveshaft loops of 1/4 inch thick 1 inch wide minimum may have a different set up for this, but needs to be as strong, also rear U-joint shields covering rear U-joint. Revised Jan. 2024
Rules
Racing fuel is allowed up to 110 octane unoxygenated.
Must be street legal with current insurance and registration.
Must have good inspection sticker unless it has antique or out-of-state license plates where stickers are not required.
DOT approved tires only. No cut tires, wheel chains, or dual wheels allowed. Single wheel only. May take out side dual off. No tires wider than 14.5 and taller than 40 inches.
Must have all factory sheet metal. No cut or fiberglass body panels. Steel cowl induction hoods are allowed.
Steel flat beds are allowed. Must have a headache rack if home built or factory. NO aluminum or all wooden flatbeds are allowed. Judges decision will be final. Tailgates are optional.
Must have exhaust behind cab with mufflers. (Revised Jan. 2024)
No pipe, steel, snow plow, or winch bumpers allowed. No hanging weight or weighted homemade bumpers. Factory built brush guards are allowed, but can’t be weighted and will be inspected. Must be factory front bumper or no bumper. (Revised - Jan. 2024)
All added weight must be securely fastened or contained inside the body, cab, or bed of truck. No hanging weight or exposed weight. No weight beyond front of frame.
All factory interior such as dash, door panels, and mirrors must be in place. No interior is to be cut out to save weight.
Must have working lights, windshield wipers, and heater. No after market seats. Must be a bench or factory bucket seat only.
Wheel base must be factory. No homemade camper specials or extended wheel base.
No fuel cells or altered batteries in other than the factory location.
Must have same engine as truck, such as chevy-chevy, ford-ford, etc.
Engine must be natural aspirated, no forced inducted, no nitrous. Single card only. Engine must be out of one ton or under and have factory rotating assembly or like factory meaning if it’s after market it must be a drop in replacement. No forged or under cutting of any kind to lighten the rotating mass. May use after market rods, but must be I beams or H beam rods — Same factory size, length, and weight. Must be same or more than factory. May have after market harmonic balancer. If pumped, can only be 0.60 over. ABSOLUTELY no strokes. Cast intakes only unless factory (must have date code) — no after market aluminum intakes. FACTORY heads only. NO after markets. Casting marks will be checked. (Revised - Jan. 2024)
Must have exhaust manifolds. NO headers are permitted.
Single line carburetor. NO dual line. Engines that come from factory. with a Holly is allowed, but it can only have the factory transfer tube. No secondary metering block. NO thread in line in secondary bowl. ONE carb adapter or spacer one inch max is legal. After market ignition is allowed such as distributer, coil, caps, or MSD (multiple spark ignition). Revised (Jan. 2024)
All accessories must be belt driven unless otherwise from factory. Electric fuel pumps are allowed.
14 inches of vacuum at 1000 rpms or under. With a half inch grace anything under 13.5 inches of vacuum will be disqualified. (Revised - Jan. 2024)
Dress up kits are allowed, such as, chrome valve covers, chrome dip sticks, etc. Oil pan must be factory.
No fuel injection unless it is factory.
No traction aids such as traction bars, stoppers, and clamps unless it comes from factory with the truck.
You may use anything factory one ton or under such as added leaf springs, over loads, or factory sway arm. Sway arm must have all factory rubber bushings.
Anything that will alter the movement of the suspension is NOT allowed.
Lift kits are allowed.
Usable Reese hitch only. No draw bar hitches. Rear mounting point cannot be closer than 30 inches from the center of rear axle. (Revised - Jan. 2024)
Hitch must be secured and usable. Must be able to pour water over the furthest point above hitch and go through hitch opening. Max hitch height is 26 inches. No trick hitches - techs have final. (Revised - Jan. 2024)
We will allow one freebie. You may use it on a 4150 duel line carb. Headers inner chassis only. No fender well headers. Intake as long as still dual plain. Traction bars single bar only. No ladder or stoppers. Must have at least one inch of travel. These are the only things you can use your freebie on. You can only have one. If two are found or anything other than listed freebie, you will be moved to comp street. (Revised - Jan. 2024)
Techs have full and final say over all rules. Tech decision is Final. ABSOLUTELY NO HOT RODDING IN THE PITS. (Revised - Jan. 2024.)
NO PUMP PROTEST
If engine is pumped you may only be 0.60 over what block you are running. If it is found to be illegal, you and truck will be banned for one full year. Then the following year it will be teched and, if legal, cleared to pull. (Revised - Jan. 2024)
NO WARNING RULES
New - Jan. 2024
Primary and secondary techs reserve the right to issue a warning for any violations that may arise during the teching session and must be resolved at next scheduled pull contestant plans to attend.
ENGINE PROTEST RULES FOR TEAR DOWN
New - Jan. 2024
If someone protests a truck engine in this class they must have on hand $1000 cash and need to get in touch with the tech at the event before truck leaves grounds. The tech will collect money and proceed for internal tech inspection at which time will mark the engine in several spots with paint marker and photo marking with no truck owner present. Then they can take truck to their shop and at that time have 12-24 hours to get one head off and the oil pan in which time there will be two techs show up to tech engine and check paint marks have not been tampered with and confirm it is the same engine that was protested at which time the bore and stroke will be checked and to confirm rotating assembly is checked. for rules stated assembly. If for some reason there is probable cause we may ask for a piston and rod be removed for length and size check and to confirm no material has been removed off piston or rod for lightening purposes. Also we may ask to check casting numbers on heads or block at which time when inspection is finished there will be $50 given to each tech for meal and fuel costs and, if legal, there will be $900 given to truck owner if cleared legal and if not for any reason the protester will recieve $900 returned if it’s found to be illegal. Protester will not be at tech site or will not know what we have found only that it is legal or illegal in which time before we leave protest shop he or she will know what we have found and decided for the out come of their tech.