I'm putting together a 76 440 with a steel crank (stock stroke) +.030 with a set of 440 source stealth heads. They advertise 80cc chambers. Can someone help me figure out a set of pistons/rings to use for a comp ratio between 9.2-9.5:1? The combo will be used with an xe274 cam, roller rockers,performer rpm intake,4160 750cfm carb, and headers.thanks!