I'd opt for a partial filled 6.1 392 (aluminum block prefered) Scat 392 stroker crankshaft, Manley rod's, Ross flat top pistons, Knowlton Thunderheads cnc ported 5.7 heads (not Eagles) with 2.08" int/1.62" exh and D shaped exhaust port if using round tube primaries. Push the pistons .034" above deck with a .040" head gasket which will give you .042" quench, port matched 5.7 DP intake manifold with E85 carb and MSD6, Sharadon Performance rockershaft ties, camshaft starting with about a 252/260 @ .050 with a 110 lsa with an automatic (peak tq will be around 5000 rpm) and 112 lsa with a stick. Done with bench building for now, time to get back to work.