Perhaps it's time to consider that both hydraulic and solid cam timing events are recorded on the cam card at .050" lift, but during the engine operation with a solid cam, those events will be altered buy the valve lash, and the valve will be opening later and closing earlier.
Forget about running the compression on the edge. My 451 runs 9.5:1 compression and makes 694 HP with 906 heads.
Cylinder heads, cylinder heads, cylinder heads make horsepower on a pump gas street engine, not compression!
Curses, I broke my rule about not getting involved.