PURE STOCK RULES:
Updated November 26, 2016
Acceptable vehicles: All North American OEM 4-link cars 1965 to present with a minimum wheelbase of 101’’. Wheelbase must measure the same on both sides. No convertibles, trucks, jeeps, station wagons or sport utilities.
Must have full firewall and floorboards in driver’s compartment. Passenger interior may be “boxed in” above floorboard but no higher than window opening.
No spoiler or spoiler sides. Rear deck must have no more than 2’’ rake (from back to mid plate). Max deck height is 45’’.
Roof raking 2” max.
No sideboards or wings of any kind or size.
Tail ends must be completely covered (side to side) one half the distance from the highest point of the rear deck to the ground. In other words, measure from ground to highest point of rear deck. (This must be done with car race ready… tires on and inflated, car on level ground, etc.) Divide that in half and back must be completely sealed that far down.
Body style must be respective to this class and must pass tech inspection approval.
No flat panels on the sides, it MUST be STOCK APPEARING. (NO EXCEPTIONS)
Plastic or rubber nose and tail piece permitted. One or two piece. Nosepiece must be stock type. No late model style noses permitted.
Must remain OEM appearing. Front and rear suspension mounts on frame MUST remain STOCK and in STOCK LOCATIONS. Altering will result in disqualification. Rectangular tubing may be used to replace rusted frames behind rear-end. Any alterations MUST HAVE TECH APPROVAL.
Uni-body frames must have 2’’x 3’’ square tubing joining front and rear frame sections. The Tech Inspector must approve such modifications and agree that it is safe or the car will not be permitted to race.
Suspension must match chassis used.
No coil-overs permitted.
No driver adjustable components.
Any coil springs, any shim, or spring spacers are permitted.
Cars must have a minimum of 5 inches ride height from the lowest point of the frame rail.
Front A-arms tubular upper (non adjustable only) OEM type lower.
(Rear) OEM location 4 link only. Mounts on rear-end must remain in stock position, and may not exceed 4” from the bottom of the axle tube to the bottom of the mount.
Shocks must remain STOCK and in the STOCK position. Heims end shocks will NOT be permitted.
No adjustable and rebuildable shocks front or rear and ALL SHOCKS must be STEEL!
$80 Claim per shock and any driver starting feature can claim any shock on any car. Claim must be made to TECH INSPECTOR in writing, which car, driver, car # before Feature Event begins. Money must be posted to Inspector at time of Claim and monies handed over to driver who’s shock were claimed after shocks are removed. Failure to allow shocks to be claimed will result in AUTOMATIC DISQUALIFICATION and 1 race Suspension.
Steering must remain OEM for type of chassis used.
OEM steering boxes only.
No rack and pinions.
Steering quickeners allowed.
Engine type (GM, Ford, Chrysler etc.) Must match chassis used.
Maximum engine size is 350 (GM) 351(Ford) or 360(Chrysler). 602 crate moto with .4412 two barrel and all seals intact. Willeys Metering Block is NOT ALLOWED. 602 Crate motor is allowed and must have part number for each item as sold; any item is subject to Inspection. All part numbers and casting numbers must be visible for Inspection. GM engine seal bolts must be in place or be sealed by a Crate Racin’ USA, RUSH or FASTRAK certified builder.. No strokers of any kind.
No fuel injection. Production fuel injected vehicles must be changed to carburetion.
No aluminum blocks. No aluminum heads.
Double-hump heads and vortech heads are permitted. No angle plug heads allowed
Engines may be bored to .040 over bore.
Hydraulic camshafts only
No solid cams.
No roller cams. No roller lifters.
No roller rockers. Roller tips will be permitted.
Stock stamped 1.5 rockers only!
Furthest forward spark plug in line with upper ball joint.
ONLY OEM cast iron intake no high rise. EGR may be removed and a plate installed.
Use 1’’ adapter plate to mount 500 CFM 2bbl Holley carb only. No Angled Adapter Plates
Stock 500 cfm #44122 barre Holley Carb only.
OEM stock stroke crank shaft only.
OEM length connecting rods only.
Pistons: flat top or dish only; No dome tops permitted.
No porting and polishing of any kind
OEM type ignition systems only.
OEM length connecting rods only
OEM cast iron exhaust manifolds are allowed. Street-style in-chassis headers are permitted with max. 1-5/8” and a 3” collector/exhaust.
Transmissions must be OEM type – automatic or standard. Must have all working gears.
Standard must have steel blow proof bell housing with an inspection hole in the bottom.
OEM steel flywheels only.
Minimum 10’’ single disc clutch.
Automatics must have working torque converter with steel scatter shield.
OEM rears, Ford 9 inch rear, or floaters permitted with stock location mounts.
Standard 5-bolt no wide pattern hubs.
Rears must be locked.
Cars must start and run under their own power.
Cars must have working reverse.
Minimum weight will be 3200 lbs. (with driver) after feature.
Steel 15’’ racing wheels only.
15 inch tires only. 27.5/8.0×15 max. on 7’’ or 8’’ rims only. NO BIGGER!! Recaps allowed. Any compound allowed. NO ALUMINMUM WHEELS!! NO WINTER TREADS!!
Bead locks allowed on all four wheels.
ROLLCAGE / SAFETY
1- ½ seemless tubing or larger
Roll cage is 4 post design with “X” bracing behind seat with 4 door bars on drivers sides and 3 on passenger side fastened to frame. No bars outside the body including rub rails.
No square tubing
Highly recommended padded roll bars/cage
Fuel cell mandatory in fuell cell can. Fuel cell MUST BE SECURELY FASTENED and must be sealed at top, bottom, and sides.
Fuel Lines run under floor, if not must be covered and sealed at both ends by rubber hose only.
A full metal firewall must be installed between driver and engine and between fuel tank and driver. Driver compartment must be COMPLETELY enclosed.
Fuel Cell must be mounted behind the rear end housing between frame rails. Must be securely strapped with a minimum of TWO steel straps that are bolted to the frame. Straps MUST be a minimum TWO inches wide and 1/8” thick.
Gas only; no alcohol.
No driver controllable brake bias adjusters or shutoffs.
Other than the requirements or exceptions listed elsewhere within the rules, the car and all components MUST remain stock appearing.