Kendall,
Yes, this has been discussed before..... a number of times. An SS 454 Monte is no more a Supercar than an LS-6 Chevelle. These cars were available to the general public under RPO's. By generally accepted definitions, both here and other sites, the term 'Supercar' indicates a vehicle produced under the COPO program or a transplant handled by one of the few High Performance Dealers around the country such as Yenko, Nickey, Dana, Baldwin, Gibb and their Associates like Dick Harrell and Motion Performance. (Of course, we're talking Chevrolet here. Ford and Mopar had their own versions; Shelby, Tasca, Mr. Norm...,etc.)
As we've said before; they're Super Cars, just not SUPERCARS. It's constantly discussed and sometimes even challenged, but the "General Acceptance" is above.
Now would someone please add a legal disclaimer to my ramblings?