Plug your numbers in here:
https://www.summitracing.com/popup/calcsandtools/compression-calculatorAssuming zero deck height and 0.040" gasket thickness, you get around 12.0:1 with the numbers you provided above
That's assuming the piston dome really does work out to 33 cc.
Color me surprised! That big bore and stroke really do make a difference. Note that you need to enter your piston dome cc as a negative number on the Summit calculator...
