Edelbrock heads

The difference between those two part numbers is the valve springs, with a "268" cam I doubt you need the "roller cam" ones.

What ever you buy, have a reputable shop look them over and verify the heads are sound. Like go over the valve job, valve to guide fit, spring install height, etc.

Have you considered talking too one of the supporting Mopar shops like MRL, IMM and I think there are a few other?