Can you guys help me figure out my Compression ratio

With aluminum heads, you can get away with just about any cam, on that Scr..
I have run 11.1 with a 249*, and 10.7 with a 223*, and a 230*. All of these I ran on 87E10.I have recently discovered that these 360 Eddies might actually be 63cc chambers, and not 65 which is what i used for calcs.. I never measured mine. If that's true, then my actual current Scr is 10.9, and not 10.7 as previously believed.It also means I was running 11.4 with the 292.The Dcrs with all of these was 8.5 to 8.75, adjusted to 900ft elevation.