Before the crash of the Randy Ayers board, Tom was doing a series on how to make a convincing shelf model LMS Chevelle from the old wire axle kits... trying to recall specific details but it was a while back and I wasn't taking careful notes.
If it were my project, knocking out the engine compartment and slinging the body over an early Monogram GN chassis (Monte SS, et. al.) which are cheap as dirt would be a good start. Would need a chassis strech and a little fab work for the tin, but you would be durn close.
Did a bit of Grokking for same with a 1/24 '69 GTO, wasn't far off, but needed a chassis stretch and more fab work than I was ready to give it.