I’ve done both. Replaced my radiator with a new direct bolt in aluminum in my 1963 C10. Couldn’t be happier and the cost was about the same a a radiator shop recore. Just depends if you insist on original or not. Keep in mind that V8 and Inline 6 radiators have different shapes.
I had a nice 1965 fuel tank that I restored with a KBS Coatings fuel tank restoration kit. It went very well but took time. So what is your time worth? I saved $50 but spent 5 hours doing the resto. You decide. If the tank has lots of goo inside, that can be tough to clean out.
