Improved Stock Class Rules

5800 and 6200 lbs.

Motor must match pickup make.Must be mounted in stock location as intended by the manufacturer.

Truck must be complete inside and out.

Factory cast (OEM) heads only. **

Must run 4150 flange carb or smaller.

May run an electric fuel pump.

May run an electric fan and electric water pump.

May run in frame headers with 3" collector max.

No weight bars on front. Must have stock oem front bumper.weight added must be in the pickup box.If you do not have rear bumper you must have bump stops.

No solid or blocked suspension or ladder bars and no clamping springs. Must be on springs. Lift kits allowed. Must use stock frame and running gear.

Wheel base must not be altered from factory.

Must pull off  hitch with front mount not to extend forward of rear spring shackles.rear mount must be within 6 inches of rear of factory lenth frame.  The entire hitch hole must extend beyond the back of the box or flat bed.Hitch hole must be mount solid to rear hitch mount. Must not pivot off from front mount. (NO PROSTOCK TYPE HITCH) Hitch must be easily accessible.These rules are if you make a hitch. You may bolt a factory receiver hitch to factory location.

480 cubic inch limit.* Dual plane intake only, no air gap type intake manifolds allowed. An exception to this rule is if vehicle was originally equipped with a GM 8.1 liter or Dodge 8.0 liter engine, these will be allowed.

Vehicles must have an exhaust system with muffler(s), 3" diameter max. Exhaust must exit at least 12" behind cab

Slipper Clutches and Stall converters are allowed.

No Profab-type transmission conversions allowed.

Vehicle must have DOT approved tires, no larger than 33 inch.

** Where "OEM" is specified in this document, it means that part is the same make and model year as the truck.