Do a search. There was a thread about six months ago that had the NAPA part number and I crossed it over to the Standard part number. Bought 10 of them from my local auto parts store.
The part number for the A-body socket in 1972 was 2496 279. Towards the end of the 70s, Mopar went to a smaller socket. It looks like it will fit, but it won't. It's too small.