340 stroker 422

Is it possible that I gained almost 3.5cc that easy? Looks to be 67.5cc chamber already.
Will measure it again tomorrow to make sure will also see other chambers to see how they compare. If thats the case, then I'm at 11.25:1

I also retarded the cam and now its at 106.5 ICL. This timing set has only 2 and 4 degrees retard and advance.