I've been looking for a fuel tank bolt for my '66 Coronet for a while now. All the damn egay auctions list a bolt "Oh, yeah, sure it'll fit a '66 - '67 B-body!" The one they list is a J-bolt with a round stop on one end. Fits '68 - '70 B-body ONLY, but the people selling these (several vendors, BTW) list all kinds of Mopars it will "fit", but just to get people to go to their auction. They have their bolt fitting everything from '63 - '76 A-body, '74 - '78 C-body, and everything in-between...like it's some sort of damn "universal-fit" bolt. My bolt has three bends in it! No way will their "fits '66-'67 B-body" bolt fit, and I'm happy I did not waste my cash for that damn thing.
Ebay sucks in every possible way.