Russ wrote:

OK, I'm calling bull**** on this one. What production Corvette was
not GRP (glass reinforced polyester) or other non-metallic composite?


I know very little about this, but a few months ago I was fascinated by
a half hour program about the history of the Corvette on public TV.
(It's one of a series.) Turns out that the first couple of 'vettes
weren't muscle cars at all, but gutless wonders with a small engine and
two-speed automatic transmission -- it took a while to evolve. I don't
recall for sure, but think it's likely those were metal.

Roy Lewallen, W7EL