Here is a Craigslist ad for a 1967 Buick Riviera. Looks okay. Not the best paint job.
https://kansascity.craigslist.org/cto/d/1967-buick-riviera/6301342938.html
https://kansascity.craigslist.org/cto/d/1967-buick-riviera/6301342938.html