Two choices in my opinion, lower the compression ratio(under 9.5 to 1 with iron heads) or put a set of aluminum heads on it I'm not familar with the software and the abilities of your EFI system, can it control the timing? If so use it
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
I'm not familar with the software and the abilities of your EFI system, can it control the timing? If so use it 
