One thing for sure, it isn't a Mopar Performance cam. I'm quite sure the "272" refers to advertised duration and MP/DC never named cams for their duration.

It most likely isn't an Isky cam because Isky usually had 270 degree cams, not 272.

So you're looking through all the old cam catalogs looking for cam families with a "9" or a "91" numbering prefix for B/RB engines.

R.