400 budget compression HELP +++++

dodge71demon said

Well we have decided to use the KB240 pistons and deck the block as needed for quench which as I see it equates also to compression. No stroker in the future this should be fine for what I like thinking to much again once the block is decked and heads milled (worked out to be 76CC) I know the intake will also have to be milled but how about the valley pan

Click to expand...

Lot's of milling going on here. If you are using the stock 400 heads and they have been milled to 76CC that would be about .067" worth of milling. Then if you mill the deck to get zero deck height you go another, what, .026"? So now there is .093" total. You now have to mill the intake surface of the head or intake manifold .114". The combustion chamber and block milling effectively raises the block rails where the intake pan gasket bolts with the six 1/4" bolts. Then you need to mill the block rails .158" so that the pan gasket slides into place. Me, I'd figure out another plan.