Ok, here's the class outlines so far. Class I is non-tube chassis cars, minimum 100 inch wheelbase, 2400 pounds. Class II is stock or aftermarket chassis cars, minimum 92 inch wheelbase, 2100 pounds.

Nostalgia Pro Stock

1. Classes:
Open to vehicles formerly used in Pro Stock competition. The following vehicles are eligible to compete:
Class I: 1969-70 AMC AMX, 1971-74 AMC Javelin, 1971-77 AMC Hornet, 1969-73 Chevrolet Camaro, 1969-74 Chevrolet Nova, 1970-74 Dodge Challenger, 1971-72 Dodge Demon, 1973-76 Dodge Dart Sport 1970-77 Ford Maverick, 1969-70 Mercury Cougar, 1971-77 Mercury Comet, 1969-73 Ford Mustang, 1969-74 Plymouth Barracuda, 1970-76 Plymouth Duster, 1969-73 Pontiac Firebird.
Class II: 1970-78 AMC Gremlin, 1971-77 Chevrolet Vega, 1974-81 Chevrolet Camaro, 1971-78 Dodge Colt, 1976-80 Dodge Aspen, 1978-83 Dodge Challenger, 1978-83 Dodge Omni 024/Charger, 1971-79 Ford Pinto, 1974-81 Ford Mustang II, 1971-73 Plymouth Cricket, 1976-80 Plymouth Volare, 1976-80 Plymouth Arrow, 1978-83 Plymouth Horizon TC3/Turismo, 1974-81 Pontiac Firebird.
Vehicles need not be authentic Pro Stock cars. Clone cars acceptable. Tribute (period correct) cars acceptable. All vehicles must dial at an established class index during eliminations: (8.00, 8.50, 9.00, 9.50, 10.00). Contestants will qualify based on running closest to their index without running quicker, during time trials. Cars will be laddered beginning with the first round of eliminations.

Also, here's another pic for you. This is Billy Stepp's first Challenger which I used to own. It started out as a stock 1970 Hemi Challenger R/T, 4-speed, Hemi Orange. If we're lucky, we'll see this car racing out of Minnesota soon!