I'd consider any 454-upgraded-by-a-dealer-with-paperwork Camaro a supercar.
I think the "car made for racing" criteria is a little too loose. You'd have to acknowledge 2-barrel/350-powered Laguna S-3's, as these are just as much product of the homologation-for-racing criteria as the 50 L-78/TH400 '68 Novas, or the ZL-1's for that matter
