L.A 360..Magnum ?

Odds are the magnum won't even need bored. Low tension rings and efi make em last forever.

And you'll NEVER wipe a cam lobe with that roller cam. To me, the roller cam and its improved profiles makes this a no brainer. The magnum heads are pretty good, and net you 1.6:1 rocker arm ratios.
Electric fuel pumps are something you ought to do anyway.