Rules locked 2023,2024,2025
With the exception of safety requirements approved by the board.
Must also follow all general rules listed above.

General Rules:

ENGINE:

Gas only, NO alcohol, E85, or fuel additives.

Naturally aspirated engines only.

MAX cfm carb, 4150/4160 Holley flange only. (No Dominators, King Demons, SV1, or split carbs.)

MAX 478 cubic inches +2%

Small blocks are NOT required to be pumped.

All pumping must be done at the track.

Blocks and heads MUST be cast iron.

Aftermarket blocks and heads are allowed

No aluminum blocks and heads are allowed.

SFI approved harmonic balancer.

MUST use SFI approved flywheel.

Motor must be mounted within 6? of original V8 mounts.

Must have a catch can for the radiator.

DRIVETRAIN:

Dual disc clutches are allowed.

No reversers or drop boxes allowed.

Big rear axle is Allowed with small block only .

¾ Ton rear axle or less - no ho110 our square tube rockwell rear ends.

No planetaries allowed.

Manual transmission MUST use a SFI approved bellhousing (blow proof).

Must use a block saver plate.

If bellhousing has been altered in any way (cut, torched, or welded) you must also run an SFI approved

transmission blanket.

Automatic transmissions MUST be covered by an SFI approved transmission blanket.

HITCH SETUP:

36” minimum hook point from center of rear axle.

48” maximum hook point from centerline of rear axle.

Bolted clevis or hitch point must have 3.5” hole.

Hitch height is 30” maximum.

Must have sled stops that extend at least 8” past the rearmost point of the truck.

CHASSIS:

Rigid suspension is permitted.

Front weights must not extend greater than 60” from centerline of front tires.

DOT tires only. 35×12.5 maximum manufacturers tire size, no cut, siped, or barred tires allowed.

All U-joints and chains must be covered with a 360” loop and be at least 6” wide constructed of 1/8” steel

or 3/16” aluminum.

Vehicles up to 140” center to center of axles may run fully weighted.

Vehicles over 140" no weight rack front of bumper.

No vehicles over 146” allowed.

ALL THE ABOVE RULES WILL BE STRONGLY

ENFORCED DUE TO YOUR SAFETY AND THE SAFETY

OF OTHERS. THE OFFICIALS’ DECISIONS ARE FINAL!

**The Head of Class/Tech Official for each class will enforce

all of the rules! Every vehicle will be teched on a random basis

at some point throughout the season.**