I just went through this WHOLE process of building up a 400.
Here is the specs of the engine that I did, feel free to me if you want to chat, I'd be more than happy to help.
400 block bored .030 over. ----- a. Casting flash around pushrods removed. b. Square-decked and removed .010. c. Cleavite bearings.
Forged Sealed-Power pistons. ----- a. Hasting rings.
Stock connecting rods. ----- a. Excess weight removed from both ends, then balanced. b. APR rod bolts.
Stock crank ----- a. Excess weight and casting flash removed. b. Balanced
Cam is clone of Summit-2801 that came with my rebuild kit ----- a. 214 int/224 exh
6X-4 heads ----- a. Exhaust valves enlarged to 1.77. b. New valves and springs. c. Cylinder bowls ported and all casting flash removed. d. All casting flash removed in upper oil drain down area. e. 1.5 ratio Comp Cam Magnum roller-rockers.
My final compression ratio will be right about 8.6:1.
