Originally Posted by GMRULZ
So from reading the below: it looks like if you have a supercharger you are out if you have an SS. ZL575 or ZL1 you are golden. Will be looking for my badging shortly...
SECTION 10A: STOCK CARS, ENGINE:1, ENGINE (Page 3)
Must be same year and make as car used, aftermarket NHRA accepted cylinder blocks permitted. Equipment other than original factory-installed prohibited. Any special equipment export kit (superchargers, dealer-installed options, etc.) automatically disqualifies car. Engine must remain in stock location — height, setback, etc. Cylinder bores must not exceed .075 .080-inch over stock. Bores are measured at top of cylinder where ring wear is not evident. Crossbreeding parts prohibited. Normal balance job (i.e., one piston/rod assembly untouched) permitted. Otherwise lightening of component parts prohibited. All carburetors, manifolds, heads, etc. must be tightened to prevent any air or fuel leaks. Vacuum lines must be securely connected or blocked off. Stroke tolerance is +/- .015-inch. Stock OEM crankshaft mandatory. Stock OEM or NHRA-accepted aftermarket crankshaft mandatory. Aftermarket crank must retain OEM configuration; (i.e., billets, knife edging, etc. prohibited). Lightening of crankshaft other than normal balance job prohibited. Cylinder blocks may be sleeved. Aftermarket SFI Spec 18.1 harmonic balancer mandatory in AAA/S through G/S and AAA/SA through G/SA. See General Regulations 1:2.
SECTION 10A: STOCK CARS, DRIVETRAIN:2, TRANSMISSION, Automatic (Page 6)
Any model transmission, same make as car, with a maximum of three forward speeds (unless OEM equipped with more than three forward speeds). (must be same make as car) having same number of forward speeds (O.D. gear not
required,) and reverse permitted. Transmission case must be OEM or aftermarket OEM replica from a standard, automotive application as found in the Official NHRA Stock Car Classification Guide. Aftermarket case must meet SFI Spec. 4.1 and 30.1. NHRA-accepted adapter plates permitted. Modifications to shifting patterns are permitted, provided full shift pattern is retained. Full shift pattern must include park and reverse. Any gear change must occur as a result of an internal function of the transmission or from direct action by the driver. Lockup converter permitted if OEM-equipped with lockup converter and OEM transmission is used. Otherwise, lockup converters prohibited. Electronic rpm controls for the electric (internal or external to the transmission) shifting of automatic transmissions permitted in computer-controlled vehicles only. Otherwise, any gear change must occur as a result of an internal function of the transmission or from direct action by the driver. Pneumatic, hydraulic, electric, etc. controls and shifters in all non-computer controlled electronic-fuel-injected vehicles prohibited. Deepened stock or aftermarket transmission oil pans permitted. Drilling of transmission case or rear of engine block to adapt incompatible units prohibited. Functional neutral safety switch mandatory. Transmission brake prohibited. Tailshaft modifications for bushing replacement, or NHRA-accepted aftermarket tailshaft, permitted. See General Regulations 2:12, 2:14.
SECTION 10A: STOCK CARS, INTERIOR:6, UPHOLSTERY (Page 9)
Must have full factory-type upholstery for year/model claimed, including factory-type floor mats or carpet, door panels and headliner, and front and rear seats. Interior gutting prohibited. Driver’s seat tracks may be bolted down. Sun visors optional. Rear seat may be removed when roll bar is installed; area must be carpeted or upholstered equivalent to factory specifications (no bare paneling). Full-size aftermarket or corporate OEM front seats permitted; must be upholstered and supported. See General Regulations 6:2.
SECTION 10A: STOCK CARS, DRIVER RESTRAINT SYSTEM (Page 11)
Three-inch driver restraint system meeting SFI Spec 16.1, including crotch strap, mandatory in classes AAA/S through AA/S M/S, AAA/SA through AA/SA M/SA, all convertibles, and in any car running 11.49 or quicker. Restraint system must be updated at two-year intervals from date of manufacture. See General Regulations 10:5.
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