The December, 1972 issue of Special Interest Autos (#14) verifies that "Inside and outside door handles are same as those used by Kaiser-Frazer and Willys," although, obviously the inside handles are not exactly the same. Perhaps they mean the same push-button style, but different hardware for the buttons and rims. The magazine goes on to say "Prototypes use Lincoln steering wheels." I'm not sure if they mean that some Tuckers use any other kind of steering wheel. I assume all Tuckers qualify as prototypes.