My concern (and my conclusion) is that the intake is actually bit harder by the heads as the motor heats up. I did measure the gaps as kindly described to me on this and other forums with square results.
I’ve reassembled using liberal application of permatex aviation gasket maker. So good so far,
oil level seems to be holding and she seems to be running crisper (no more two stroke fuel?)...
Thanks again gentlemen for your help!
Steve H
1764