The Stovebolt Site Forums The Shop Area The HiPo Shop milling the head

First make sure the casting number is 3836848 which has the smallest combustion chamber and second check what is possible by zero decking. I can remove .060” from the top of the 261 blocks I have to make the pistons flush gaining compression without polluting valve train geometry. Bear in mind that much of the improvement of milling the head to make the combustion chamber smaller is taken back by having to move the intake valve back by the same amount (1.875” diameter). When it comes to cutting seats on these old heads I like to think take as little as possible to preserve service life.