If you have any cam at all in, you shouldnt need to reduce the compression. Your bascially at 9.3-9.8 to 1 with iron heads.

Plenty of guys run 10 plus with iron heads on pump fuel with no problems. Im at 10.6 with iron heads, no quench, etc. Timing at 34 total I have no problems. I do put a few gallons of 100 in it at the track.