"...Or we would have it done. If so, I would do a 78-83 G body (LeMans, Grand Am). So if there is still a granny car like this out there, in great body condition, let me know..."
Don't know exactly how clean it has to be. But here's a '78 Lemans that looks decent in the pics, for $2500.
https://houston.craigslist.org/cto/5703473167.html