What I mean say your looking to build 500 hp street/strip engine your probably gonna use or port some heads that flow 300 ish cfm and add a 245 ish cam with enough lift to use most of the 300 ish cfm and have a cr around 10-11 to 1 with appropriate intake/exhaust.
No matter what displacement, obviously the fine details will very but that's the ballpark I don't care if were talking 273 or 440.
