I removed the front end sheet metal on my 56, surprizingly had about 1 in 4 body and fender fasteners.  Out of 16 possible on the splash pan had four, on the fenders and wells about the same.  I want to use later model fasteners (bolts and u nuts) the 5/16 24 can be saved for someones restore, does anyone know which late model fasteners work on 1956 sheet metal?

Ted, Redding, CA