If I mill .050 off the head and use a .027 thick gasket (the thinnest I can find) that should put me around 11 to one compression but I will have .032 quench. I calculate that the milling .050 results in 10.5cc reduction in the chamber. converting the 10.5 cc is equal .6407 cubic inches. I could deshroud the valves, recheck the CC's and maybe mill a small pocket if necessary on top of the piston to bring the compression area back to what it was before milling. the deck of the head looks thick enough to take .050 off.