It seems to me the '63 Chevy II came with a circular oil bath filter. But being a new age guy and all, I replaced it with a paper filter at the first opportunity. My '65 Mercury Comet had a circular air filter with a paper filter as well.Oil bath air filters. I got to clean them during the oil change.
A friend had an even older Mercury Comet 6 cylinder. One day one of the metal tabs that prevented the air filter housing from rotating fell off and was ingested by the engine. There were a lot of unpleasant clanking noises for a few minutes and then it reverted to its previous gutless sounds. Whether the tab was ejected through an exhaust valve, pounded into the top of a cylinder or got caught somewhere we never found out.