Ramm thanks for all the pictures and information. I knew there was hp in the repositioning of the heads as a friend of mine had a challenger race car that he and another friend of mine built on a shoe string about 16 years ago. They moved the heads up on it and it ran extremely well for what it was. 440 Short block was stock down to the cast pistons. Block was zero decked. Heads were 915 mildly ported 2.14 1.81 valves. Cam 528 Mopar cam, m1 intake, 850 Holley and 1 7/8 super comps. 727,10" converter 4.10 gear. All this installed in a 70 challenger that weighed 3600 ready to run. Great weather 10.90's. Hot weather 11.teens. Pretty quick for a combo most wouldn't think would get out of the 12's.
With the new Cnc block machining centers can't you re position the bores? If you could move the bores down in the block .020-.025 then move the head .120 that would be substantial.
For the guys that need the head stock but would like a better valve angle would you angle mill the block?