A stock 1972 6138/6139 TQ would be absolutely fine on that build, any TQ jets and rods will work in them so tuning is a breeze. I have good cores of either I will sell with a build if you decide to go that way.

*Also, if you plan on running pump gas I'd suggest a cylinder head choice that nets you 9.5:1 or lower final compression or you'll more than likely have problems with detonation.