Getting the crank kit is the way to go and internal balance too.
The 2-bolt block is fine. When I built my 379 the shop I took it to asked..
"Why not go 406..you are giving away 50 Lbs of torque right off"
I said RPM's with my parts would Kill the 406 and of course he said not if it's built right... So after a few years and some better parts I am going to a 422ci..
