I found a 510cid rotating assembly Scat offers with around a 13:1 piston they also have another option with a 8:1 flat top piston. when I get a chance ill call them but that sounds like a plan.
projecting a solid roller cam around .720'ish on the lift (off the top of my head)
maybe some shaft mounted rocker arms just to be safe
and maybe a tunnel ram with dual 750's just for a little taste of nostalgia
-it's all about baking cookies ha!