HOBBY
FRAME & CHASSIS
A. Automatic frames permitted.
B. Automotive snout must include: cross member, spring
pockets, horns, and attaching rail as one complete unit
as it was assembled at the factory. May trim spring
pockets for clearance of racing springs and spring
buckets.
C. Wheelbase of 103” on snout frames or stock for make
and model on stock frame cars.
SUSPENSION
A. NO coil over springs permitted.
B. Jack bolts, racing springs, and racing shock
permitted (4” min. spring).
C. Racing leaf springs permitted – steel or fiberglass
on rear (one type only).
D. Bottom A-frame must be stock – no shortening or
lengthening allowed.
E. Top A-frame must be tubular, but only be adjustable
at the mounting plates to frame.
F. Any GM or Ford spindle permitted, wide 5 hubs
permitted.
G. Front spring pockets must be in original location.
H. No 5th coils. Air shock permitted.
I. Lift bars permitted. Fiberglass/Pan hard Bar/Solid
Rubber Biscuit permitted.
J. Coil over eliminators permitted.
STEERING
A. Rack and pinion permitted.
B. Power steering permitted.
REAR END
A. Stock type rear end or equivalent.
B. May be locked.
C. Quick-change rear ends permitted.
BODY
A. Any American car except convertibles, compacts, pick
up trucks, or station wagons.
B. SAS (star bodies) Bodies permitted.
C. Must be steel or aluminum, no fiberglass bodies
permitted.
D. Must have grille or rubber noise piece.
E. Must have approved firewall and floor pan.
F. Spoiler not to exceed 8” and width of quarter panels.
Side braces may not exceed 18”.
G. Rear bodies not to exceed 48”, including spoiler.
H. Nose piece cannot extend more than 46” from center of
front wheel.
BUMPER
A. Must be track approved.
B. No sharp or exposed edges.
C. Bracing permitted.
ENGINE
A. 362 cubic inches maximum.
B. Flat top pistons.
C. Hydraulic or solid lift cams permitted.
D. Lifter valley may be polished.
E. Headers permitted, exhaust must exit parallel to
ground.
F. Any stock steel or cast crankshaft permitted, stock
stroke for motor.
G. Stock or stock appearing rods permitted, no H-beam,
or billet rods permitted 6.0” maximum.
H. Any wet sump oil pan permitted, internal pump only.
I. Engine may be balanced; crankshaft must appear stock
except for drilling or welding for balancing. No ground
or knife-edge counter weights permitted.
J. Sealed crate 602 allowed.
HEADS
A. Cast iron ONLY.
B. Straight plug heads or angle plug heads permitted.
C. Vortec or 300hp heads permitted.
D. Approved stock replacement heads permitted.
E. Steel valves only.
F. Double springs.
G. Valves: 2.020” intake 1.600” exhaust
H. Roller rockers permitted. No shaft rockers.
I. Screw in studs and guide plates permitted.
J. Stud girdles permitted.
K. No more than three angle valve job.
L. NO PORTING, POLISHING OR PORT MATCHING.
INTAKE
A. Aluminum intake permitted.
B. Single carburetor type only.
C. NO PORTING, POLISHING OR PORT MATCHING.
D. No homemade intakes allowed.
CARBURETOR
A. One four barrel only, no more than 750cfm permitted.
B. H.P. Carburetor permitted. No special production.
C. No matching, porting or polishing of venturils.
D. Choke housing may be removed cut must be consistent
with top ring of carburetor.
E. 1” carburetor spacers allowed.
F. Maximum of two .060 gaskets allowed.
HEADERS
A. Any type permitted, but must run parallel to ground.
FLYWHEEL/CLUTCH
A. Z-28 flywheel permitted.
B. Little clutch permitted.
IGNITION
A. Factory electronic or HEI only.
B. Racing coil permitted.
C. MSD permitted.
D. No add-on boxes except for a rev-limiter.
WHEELS
A. Bead lock permitted.
B. 12” wheel maximum.
C. Steel and aluminum wheel allowed. However if aluminum
is used add 20 pounds per wheel !
TIRES
A. Open Tire
NUMBERS
A. Must be 18” high and on each door.
B. Must be visible and legible from scoring tower.
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