Just so the info is in the system, should anyone need it, the Olson (the ones Dave Murray represents) head gasket thickness for 8 cylinder engines are
UNCOMPRESSSED .093″
COMPRESSED .083″ or about 10% less than uncompressed
These are probably averages, the guy at Olson just went out and measured one, but at least it is a baseline.
For what it is worth.
Bill