Do 1972 Chevy C10 doors fit on 1973 C10?

No, the doors from a 1972 Chevy C10 will not fit on a 1973 C10. While both models are part of the same generation of C10 trucks, there were significant changes made to the body style between the 1972 and 1973 models. These changes included a new, more rounded front end and revised body panels, which resulted in different door dimensions and mounting points. Therefore, the doors from a 1972 C10 will not fit properly on a 1973 C10.