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Pro Stock 4x4 Truck

1)      Cubic inch limit is 485 Cubic Inch Displacement (CID).

2)      Solid rear suspension allowed.

3)      Edlebrock type single four-barrel manifolds. No tunnel rams.

4)      Headers must go straight up and out of hood or down and straight back, they cannot turn straight down.

5)      If the bed is cut out, it must be covered.

6)      Firewall must be original or made of material equal in  strength. No open holes.

7)      Any heads are acceptable, except hemispherical heads.

8)      All trucks must have side shields from the frame to the bottom of cylinder head.

9)      An aftermarket transfer cases are allowed.

10)    Any rear axle is allowed. Any front axle is allowed.

11)    All weights must be securely attached to vehicle with leading edge being no farther than sixty (60) inches in front of centerline of front axle.

12)    Hood may have holes for headers, and air cleaners; air cleaner may not extend more than 3 inches above hood line, measured horizontally 
    from the rear most part of the hood. Carburetor must be below hood.

13)    Tire size is limited to DOT 33x12.5 or 305/70, or 31x15.5 bar type tires.

14)    Front tires cannot track past center of rear tires or vice versa.