10.16 to 1cr = (swept + clearance)/clearance
swept volume = 3.1417 x radius x radius x stroke
volume of a cylinder = pi x radius x radius x stroke
swept = 3.1416 x 2.0325 x 2.0325 x 2.906
swept = 37.715 cubic inches
swept = 37.715 x 16.37 = 617.4 cc
clearance = deck clearance + flycuts + chamber + head gasket
deck = 3.1416 x 2.035 x 2.035 x 0.030"
deck = 0.39 cu. in.
deck = 0.39 x 16.37 = 6.4 cc
valve notch = 6 cc
chamber = 46.5 cc
gasket = 3.1416 x 2.035 x 2.035 x 0.040
gasket = 0.52 cu in
gasket = 0.52 x 16.37 = 8.5 cc
total clearance = 6.4 + 6 + 46.5 + 8.5
total clearance = 67.4 cc
c.r. = (617.4 + 67.4)/67.4
c.r. = 684.4/67.4
cr = 10.16
Yep, your compression ratio is 10.16 to 1
And yes, if your info is good, that IS your compression ratio.
Good Luck!