Pennsylvania Antique Tractor Pulling Association

8500 Work Stock Diesel

The Work Stock Diesel class is designed for DAILY DRIVEN, on the road pickup trucks (full

bodied, diesel pickups) with minor modifications. A valid DOT registration, state inspection and

license plate are mandatory. All entries will weigh 8500 lbs. or less with the driver.


• OEM equipment and seat belts.


• Ballast is permitted.

• Nothing may be added to front of truck or cab that may be act as ballast.

• Ballast may be added in the bed of the truck. If used, ballast must be securely fastened

to the bed.


• Batteries must be securely mounted in the OEM location with a solid or metal hold

down. No bungie cords allowed.


• The body must be the OEM truck body, including the full bed floor.

• The body must retain full sheet metal.

• Metal aftermarket hoods are allowed.

• Fiberglass hoods are permitted with a sheet metal or aluminum skin shield underneath

of at least .060” thick.

• The hood must be closed and securely latched while the vehicle is hooked to the sled.

• The complete OEM firewall and the OEM floor pan is mandatory.


• 4-wheel hydraulic brakes are mandatory.


• The OEM chassis mandatory.

• The engine must be in the OEM location for the body used.

• Wheel tubs, back-half conversions, tube chassis, etc. are prohibited.

Cooling System

• Radiators must be in the stock location and be of at least stock size.


• An OEM or factory option transmission and transfer case are mandatory.


• The engine is limited to stock OEM make-specific compression ignition engine.

• Nitrous Oxide and Oxygen Extenders (Propane, Methanol, etc.) are prohibited

• Engine must be the OEM engine for the truck as intended by the manufacturer.

• Programmers or chips are allowed.


• The turbocharger is limited to stock OEM/factory make specific turbos only. No

aftermarket turbos are allowed.

• 6.4 Powerstroke engines may utilize the factory twin turbo configuration.

• Turbos must be in the original location with no mounting plate adapters of plumbing

changes allowed for higher turbo outputs.

• No ball bearing turbos.


• The vehicle must have a working suspension, front and rear.

• No blocked or solid suspensions will be allowed.

• Traction bars are allowed.

• Air suspension is allowed. Air compressors must be disconnected.

Fuel Injection Pumps

• The fuel injection pump is limited to stock OEM engine model specific pumps only.

• The use of multipole high pressure common rail fuel pumps is prohibited.

• Pumps for different years in the same engine model application may be interchanged.


• Exhaust may be other than factory but must still be street legal.


• The hitch must be a receiver style hitch and stationary in all directions.

• The hooking point must be the rear most point on the vehicle and must be rearward of

the stock location of the tailgate.

• Bumpers may not be notched or removed.

• No pulling from the bumper.

• Hitch height must not exceed 26 inches from the ground.

• The hooding point must have a straight clevis or a reese type with a minimum hole size

of 3.75 inches.


• Tires must be DOT rated street tires.

• No cut or altered tires.

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