Body:    American made factory street cars, 1955 or newer. Cars must have a stock appearance. Convertibles, sub-compacts and front wheel drives are NOT allowed. Body and frame for make and model of car must remain stock. Stock front and rear firewall, floor pan, hood, trunk, rear fenders and rear fender wells are REQUIRED. Front fenders may be fabricated, but must resemble stock appearance. Rear fenders and doors may be repaired with sheet metal. Bracing of uni-body is required. Cars must be painted with a contrasting number on side and the top. Brake petal must remain in stock location for car. Drivers seat no further back than rear of window opening. May use aftermarket or fabricated gas and clutch pedal. The TOP FIVE cars in the feature or semi-feature must weigh before leaving track or be disqualified. MUST WEIGH 3300 lbs with driver.

Engines:    All engines must be stock production, cast iron. All casting numbers must be readable. Pistons must be stock or stock replacement only. Must be a four valve relief, flat top piston with 5/64 compression rings and 3/16 oil rings, no light weights. Forged pistons are allowed. Ten thousandths deck clearance. Crankshafts must be stock type and weigh a minimum of 50 lbs. May run a fluid dampener. DO NOT CUT DOWN CRANKSHAFT. Stroke must be stock, plus or minus ten thousandths. No stroking or de-stroking allowed. Stock rods only. Powder rods are legal in GM. HYDRAULIC CAMS AND STOCK HYDRAULIC LIFTERS ONLY. Camshafts maximum .450 lift. No factory stamp required. NO roller cams, lifters or rocker arms. Stock 1.5 rockers, standard or long slot. Poly locks, valley pans and double roller timing chains are allowed. Distributor must be stock or stock replacement. May use aftermarket coil and module. Coil must be distributor mounted. Engines may be balanced. Maximum cubic inch, including wear, is 362 for GM, 372 for Chrysler and 362 for all others. Motor can be set back, but the number one plug must be no further back than the center of ball joint. Cast iron manifolds, center drops OK, with a maximum 2 inch outlet. May use headers, must run inside frame. Aftermarket oil pans and windage trays are OK.  Stock, cast iron 2 or 4 barrel intake only. No aluminum or bowtie intakes allowed.

Heads:    Must be stock production, cast iron heads. Heads MAY NOT be altered by any type of machine work other than standard valve seat grinding. No porting, polishing, or gasket matching of any kind. A three-angle valve seat OK.  The valve bowl can be cut but not blended. Valve springs must be stock or stock replacement. Must be one spring with a single dampener, maximum diameter 1.275 inches. May use any locks and retainers. The valve stem neck down .015 inch maximum. The combustion chambers on heads must be NO SMALLER THAN 56cc. No shaving of heads other than resurfacing. NO ANGLE MILLING. NO VORTEC HEADS, No angle plug or off road racing heads on GM, and no W-2 heads on Chryslers. Headers OK.

Carburetor:  Must be a two barrel carburetor. May use Holley carburetor part # 4412. CARBURETORS MUST HAVE (4412) PART NUMBER ON IT. All adapters, including gaskets, must measure no taller than 1 ½ inches. Carburetor must remain stock with throttle bores no larger than 1 11/16 inches. Manual or Electric fuel pump may be used.

Suspension and Wheel Base:      Front suspension must remain stock. Racing shocks and springs are allowed. May run composite rear springs. NO air or coil over cover shocks. No adjustable shocks. Any American made 1/2 ton rear end is allowed, but must remain on stock suspension. Rear end may be locked with a mini or a full spool. No Gold Trac, Grand National rear ends or traction devices allowed. Body blocks on rear frame or axle are OK. May use adjustable spring buckets on front. Adjustable shackles on leaf springs and spring spacers on rear coil springs are OK. NO WEIGHT JACKS. NO SHOCK EXTENSIONS. Wheel base is a minimum of 104 inches, plus or minus 1 inch. Quick steering and quick release steering wheels are OK. Steering must remain in stock position.

Transmission:   Any stock automatic or standard transmission is allowed. Standard transmissions must have a stock single disc clutch and pressure plate. No button or mini clutches are allowed. Clutch, pressure plate and flywheel must weigh 42 lbs. as a unit. No aluminum transmissions. MUST HAVE ALL working gears. Blow proof bell housing required with standards.

Radiator, Tires, and Wheels:   Any radiator that fits in stock location without modification is allowed. Aluminum water pumps are allowed. No electric fans or extra cooling devices. Transmission coolers must be mounted outside of driver’s compartment. NASCAR pull-offs only. NO radial tires. Steel wheels with a max width of 8 inches only. Bead locks OK on right rear only. RACING FUEL, PUMP GAS OR AVIATION FUEL ONLY. NO ADDITIVES. Fuel is subject to be analyzed. Front bumpers may be fabricated but must have a nose cover. Nerf rails must be flush with body of car.
 
General:     A fully charged and operational Fire Extinguisher is mandatory at all times. It is strongly recommended that a fire suit be worn by the driver.