65-67 C2 Corvette BBC Oil Fill Cap--GM #6410961--- NOS--NCRS!!  No box---I had 2 of these and only one had the box still intact.  Found 4 more in original GM packaging!!!  Some have some shelf wear noted!!  AC Delco # FC 91!  Also works on later model Corvettes, Camaros, Novas, Chevelles, etc.----please check your application before ordering.