E58 400 plus HP Dart sport build

Let first figure out what head you want to run and then run some numbers on a couple of different pistons and head gasket combo’s.
The heads are purchased the cam is also purchased so that's all in already.
COMP Cams K20-602-4 COMP Cams Thumpr Hydraulic Flat Tappet Cam and Lifter Kits | Summit Racing Mopar Chrysler SB 318 360 170cc 65cc Hydraulic Roller Assembled Cylinder Heads purchased carburetor is a pro-form 850 Holley 4150 quick fuel style. Intake is a Mopar Chrysler Dodge SB 318 340 360 MidRise Air Intake Manifold Machine Polished. Also have a 1.6 ratio roller rocker assembly brand new from speed master. I have not purchased the gasket set, pistons and bearings yet and freeze plugs.