I just want to get an Idea of what kinds of compression Ratios people are running with what amounts of boost. Im trying to make a head decision from a 347 I am building. I am considering a 70cc head, which will make my compression 9:1, or should I use a smaller combustion chamber head and run more compression. I will probably be runnning about 8lbs of boost to start.. Im also located at 5000+ feet above sea level... Lee
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