Hopefully they are not Champion plugs .
Check out the plugs wires, OHM them out. Could be bad.
Same goes for the plugs, could be bad, did you change them out or have been running the same plugs for all the testing?
Spring scale off, operator error? Installed height is different than the measurement checked at?
Just covering the basics.
That is a lot of seat & over the nose pressure for a hyd camshaft.
MBHD
