Chris,
Using 62 cc combustion chamber size and reasonable guesses on the other parapmeters the stock metal head gasket would have about an 8.1:1 compression ratio, The thicker Fel-Pro gasket would lower this by about 0.5 point to 7.6:1.
Our engine has a calculated compression ratio of 8.2:1, has a stock cam, and has compressions (after break-in) in the 175 range. These are obtained after the engine is at operating temperature, all spark plugs out, carb open full, and spinning the engine unitl the pressure no longer goes up. This is about 10 - 12 "pumps."
Interestingly, engines with higher computed compression ratios can and do have lower compression values. This is primarily due to valve timing differences - the cam. If the cams are the same, and the valves and rings seal well (i.e. the engine is broken in) then a higher compression ratio sould result in higher compression pressures.
Hope this helped.
Regards, Dave