I'm starting to work on an open clone, and my biggest concern at this point is enough piston to valve clearance. I am using a dyno 308 cam, honda flat top piston, and my head is being milled .050. Should I use a standard length connecting rod? 1:1 or 1:1.3 rockers? Thin or thick head gasket? Other than asking an expert, is there a way to determine what can and can't be used together? Thanks for any help you can give me.