WRT tyhe keys, it didn't really matter since the locks would have been pretty worn by then and if it was like the '66 Fairlane a friend owned, almost any key would work. He was getting ready to leave work during a cold snap and started his engine, so it would be warm inside and inadvertently locked the door. He came back inside and wasn't happy, so I offered to try my key to open the door lock and it worked- I had a '67 LTD.