I agree about the Buick ragtop being a good choice. If you find a car that needs a lot of parts replaced, you should see if there are people making parts for the car you are looking at.

An example would be something like a 55-57 Chevy. You can buy virtually 90% of the parts new. Sheet metal, chrome trim, upholstering....anything! Make it a 55-57 Studebaker, and you may not be able to even find something simple like a windshield, wiring, brake shoes, or weatherstripping.....so check it out!