1. 1. Any truck body, any
frame, and any automotive-type V-8 engine.
2. Any single 4 barrel carburetor. No stretched carburetors.
No tunnel rams. No sheet
metal intakes.
3. Engine must not exceed 485 c.i., cast iron blocks only.
Aluminum heads will be
Allowed. No spreadports and must be stock configured.
Only heads that will accept a stock intake manifold and
stock configured intake gasket with no adapters are allowed.
Roller cams, lifters and roller rockers allowed. Other
internal modifications may be made. Titanium valves and
rods allowed. Mushroom lifters allowed. Engine can be
no further forward than 12 inches from front of block
saver plate to center of front axle housing.
4. Headers and open exhaust allowed, must exit through
hood or down and back, parallel to
the ground.
5. Body Specifications:
a. Factory wheelbase may be shortened or lengthened to
maximum 134 inches.
Bedsides may be altered in front of wheel wells to match
wheelbase on all trucks.
b. Rear wheel width cannot be narrower than 34 inches
from inside bead to inside
Bead of rear wheels.
c. OEM fiberglass components only.
d. Front windshield must be OEM type. (No plexiglass)
e. If vehicle has a bed that has been cut out, the bed
must be covered. If vinyl, the cover is to be attached
with snaps or Velcro. If sheet metal, cover is to be attached
by pop rivets or screws.
6. No working hydraulic stops on front suspension during
pull. Must have quick dis-
connect and shall not be touching spring or axle housing
before, during, or after pull. Front air bag suspension
is allowed, but all controls and valves MUST be outside
of the cab. Weight boxes must stay stationary before crossing
the scales and cannont be moved until after the pull is
over. Any air pressure adjustments require a remeasurement
of hitch height.
7. Any street legal tire may be run measuring up to or
less than 33 inch measured height.
Terra and Cepek tires allowed along with any bar tire
up to 31 x 15.50 x 15. No recapped tires allowed.
8. Any transmission, transfer case, front end or rear
end allowed. No plantetaries.
9. From point of hitch to center of rear axle shall be
no less than 36% of truck wheelbase,
i.e., 134 inch wheel base equals 48.24 inch hitch length.
Hitch heights to be 26 inches, before, during and after
pull. Hitch must also adhere to general and safety rules.
Hitch is to be no more than 6 inches from hitching point.
No drawbars greater than the angle of the sled chain.
(Acceptable angle: 0 degrees to maximum 33 degrees).
10. All Pro Stock trucks are to have adequate working
front brakes, drive shaft brakes are
Adequate.
11. Pro Stock 4x4 may run either gasoline or alcohol fuels.
12. All 4WD weights must be safely secured to the vehicle
and not extend forward more
than 60 inches from the centerline of the front axle.
(weights included) Weight bracket
is not to extend more than 7 foot at its widest point.
13. Overall, vehicles must adhere to all general and safety
rules applicable to 4x4 trucks.
Refer to General and Safety Rules section.
