doing a dirt cheap rebuild on a 400 big block. would like to run 87 octane if possible, but would like to see compression in the mid 8s with stockish smogger heads. IS there a piston out there that will do this? Never going to be a drag motor. Trying to replicate 383 Magnum performance with a little less compression.

This engine is going in a 4x4 truck. thinking MP P4452783 or maybe a Comp XE256H.