Brian, that's the reason for this post. to try to hammer out what will and will not work for different applications. for instance afaik the 8519PT1 will make it on just about any bore that a gasket of it's quality might be used on but it won't hold high CR. probably safe for most (no nitrous) applications up to 11:1ish. bore and chamber overhang is a constant problem. you can solve that by using gaskets like the 1105 but it's a real cc hog and may open up the quench distance more than you want.