I can't believe this thread has gone on this long. Who really should care if that Vette should be considered a Supercar.?? If it was a BM Vette, then YES. "By definition"!! A stock L-78 Camaro or Chevelle, or any other "stock" RPO car does NOT fit the description. They are Musclecars. "Supercars" were dealer conversion hi-po cars, or COPO cars. That's it in my mind. NO gray area there for me.
I probably should have just kept my mouth shut, since I only own pre-historic musclecar stuff.
Verne