Excuse Me, I`m running a set of ported Eldelbrock Performer RPM Aluminum Cylinder heads.With 2:05 intake /1:60 Manley valves. And I run 15 lbs of boost. And I know a number of successful engine builders. 8:1 compression is the maximum compression.Unless you want to run alcohol or race gas.Other wise the pre ignition will kill the rings.
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