340 compression test

Got the cam specs with some direction from 'crackedback'. THANKS!

I would have thought the late inlet valve closing would have kept the DCR down and result in lower psi readings than I obtained.
Is it possible that the lifters have drained of oil after a period of several months sitting then inversion on the engine stand for a few hours (while I pulled the sump off for a look) before the compression test was performed. Resulting in them compressing and not opening the valves for the advertised duration of the cam?
This 340 must have strong valve springs, they are dual springs (spring, damper, spring)

Waiting on a cam degreeing kit to see exactly how it is installed but the '0' marks on the crank and cam sprockets seem to be lined up and from what I can tell the keys look to be 0deg on both cam and crank.

Will update when I know more, but if anyone can suggest other things to look for I would appreciate it.