Your plan is very similar to 2 454's I put together some time ago, one as a 462 and the other a .60 over 468. Similar on heads, etc. as yours. To gain a bit more compression I had my GM Perf heads, # 12363400 milled to 110 cc from stock 118. Oval port heads are probably better for the street use I do, but I used what I had. Regarding cams, after lunching two hydralic flat tappets over the past year, GO ROLLER! Pat cited some Erson roller tappet cams that merit some consideration. I replaced the cam in the 468 with a Comp Cam Thumpr middle cam for a Gen IV. I know you can do better with a Lunatti or Erson grind.
Right now I am looking for a 502 short block Gen VI with a build similar to what your looking to get out of your project. See what Pat recommends.
Good to see you're back and up and at em', Pat.......!