Between using a thicker gasket and choosing a gasket w/a larger ID (e.g. 4.45 or 4.50 vs. 4.38), I can "adjust" the CR down about .2 (from 11.0 to 10.8).

The concern is the cranking pressure w/ 11.0 and the cam on hand could be pushing it w/ the available pump gas octane (93), so I'm considering ways to address this w/o actually taking a step backward.