Most cheap Vettes have been beaten on and bent. And the ones that are very nice I wouldn't dare modify or cut up. Certainly not a SB '67. Further, have you checked on the prices of repro Vette parts? Holy smokes.
Also, I would hope that technology has come a long way, and it has, in terms of suspension, body, chassis, geometry, etc. that all the old heavy metal underneath would be long gone and replaced with new modern lighter stuff, say like, um, er, a Kirkham.
Personally, I'm not hung up on owning a fakey doo, although you will find my car is in the SAAC World Registry.