Just finished doing a 2 part build using a 400BB Mopar.
We took a steel 383 crank, stock rods, KB flat top pistons and filled the stock 400 block. First test was with 906 heads, milled .050 for 79cc and compression was 9.8:1 and zero decked.

We chose a thumpr hyd. cam, stock rockers, bowl cleanup in the ports, stock valve sizes (manley valves)and comp single springs.
Topped with an rpm intake, 1" open spacer and a box stock 750holley it made 427HP @ 5700rpm and 443Tq @ 4200rpm using TTI 1 7/8 headers. Here's a pic....