I think the valves are set wrong myself and bleeding off to much compression.
I'd verify that you have the valves set right before I did anything else.
Turn the motor over by hand, set the intake lash on each cylinder just as the exhaust valve begins to open, set the exhaust lash just before the intake valve closes.
There are other ways to do it, but this is the most accurate and foolproof method I have found, and I always do mine COLD and set the lash on both valves the same.
For instance on my BBC 496 which has a 722 lift solid roller > I set them cold @ .022 A good friend of mine who used to be a R/D guy for Lunati said this will work on most solid lift and solid rollers cams, it may not work for you but it does for me and should get you in the ball park.
Goodluck, Cp