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OK, I know I'll regret this but let's give it a try anyway.
The L-78 Camaro you reference, although a rare animal for 1970, was in fact available to the general public through ANY Chevy Dealer, just like the 435 HP Corvette. The LT-1 Nova (aka Deuce) was NOT an RPO code for the Nova in 1970. It was a specially built car made possible through the COPO process. General consensus here (the Supercar Registry/ sYc) is that RPO optioned cars DO NOT fall into the 'SUPERCAR' category as defined by this site.
Another example: In 1968 an automatic transmission WAS NOT available to the general public behind the L-78 in a Nova. Fifty of those cars were built; COPO 9738. In 1969 it was available to the general public so the M-40 equipped L-78 Novas in '69 & '70 are not considered SUPERCARS.
Confusing? It really has nothing to do with huge horsepower, or whether it's a BBC or SBC. It's more about Factory/Dealer built specialty cars here.
On other sites you'll find other SUPERCARS, such as Ferraris, Lambos, Maseratis, etc. It just depends on where you are.
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O.K ..so if it's agreed that any RPO cars are excluded semantically from Supercar reverence,do the GMMG C5R race case cars qualify? They were only available through a limited dealer network-just like Bill Thomas/Dana/Nickey/Yenko,and were even emissions legal.Before you call them tuner cars,remember they share the same GM motorsports blocks which are in the ALMS Vettes that have won over 40 races from Lemans to Sebring to Daytona-pretty much mirroring what the L88's accomplished nearly forty years earlier.
