What PARTS did Hurst and Chrysler put in the Super Stock Barracuda & Dart not in other factory cars

Actually Dave, the rotors were standard A Body pieces drilled for the 4 1/2" bolt pattern, with 1/2" RH studs instead of th 4"
7/16"LH & RH pattern. Don't forget the radio and heater delete plates, the outside mirror delete, and the pass side fresh air duct.

Pass fresh air duct was used on heater delete cars sold in Hawaii, Puerto Rico, and South America.