Hi everyone! My 64 wildcat (401 nailhead, auto) just blew the planetary crosspin and it messed up all the gears inside. Now im trying to order some new parts and im confused as hell. The diff is the kind that opens on the pinion side and the whole unit comes out as one, much like a ford 9 inch. The only part number i could get is a 1365221 43-14 GMC on the ring gear. I googled it and was even more confused after that. There is several questions that i have: - is buick 9.3 and 9 3/8 the same thing? - if yes, is this the same rear end as the pontiac/olds 9.3? - where can i get parts for it? - which years interchange? I hope i can find someone here that can help me clear this confusion. THANKS!