Compression Ratio

After selecting my cylinder heads, I could now count the compression ratio my engine would have. There are dozens of calculators in the web but I used the one on Summit page. The needed facts were:

Cylinder bore	4.030 inches
Stroke	2.870 inches
Combustion chamber volume	50.5 cc
Piston volume	8 cc
Piston deck clearance	0.01 inches below deck
Head gasket height	0.039 inches

This gave me a compression ratio of 9,73 : 1. Should work pretty well with my combination of parts.