...Stock "587" heads 1.88x1.60 valves
[email protected] cam pistons are .035" in the hole comes out to 8.8-1 right now should be right at 9-1 after head change. Anyone care to guess how much HP/ tq will increase. The eq heads are 1.92*1.62 no porting this is a class racing motor will see 6kprm at the most.