At any rate instead of spending $200 on .027 Cometics, Mancini has .022 shim gaskets for $32.95 for the pair. It will put your quench at .034 which is bordering on dangerously close but maybe not so dangerous if you keep the RPM reasonable like 5500-5800. If it gets better or makes it go away, you will know you are on the right track and can then decide if the Cometics are worth the $$.
If it just makes it go from bad to worse you are only out $32.95 for the education.
