Recessed valves

It's a 318 with 360 heads, comp cams xe284 cam .507/.510 240/[email protected] edel rpm airgap intake headers. The compression ratio was a bit of a mystery. that's why I took the heads off, to cc them calculate what its at and machine them to make 10/1. But I can't get a accurate cc reading with the sunken valves. So fixing that is my first step