416" on the dyno

I figured 68cc chamber which puts my combination of parts at 11.3:1. If they are in fact at 72cc then I'm only at 10.8:1 compression which I doubt would have been enough to make that same power. Maybe 200psi is a little optimistic if you have over 12:1 and 185 psi.

No fancy metric ring pack for me either, just standard Total Seal file fit. I don't remember the gaps but they are 'within spec'.