Check My Cam Degreeing

SpeedThrills said

I have one mech lifter. I could check them with the running springs and the solid lifter. That would be a lot of work.
I could use the checking springs. That would be a lot of work, too!

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Yes, how to do to exact measurements with hydraulics.... With very light checking springs, the hydrualic lifter inner springs will not compress and you'll get tighter clearance than actual. You could shim up the rocker shaft until the lash is just barely taken up with light checking springs and then do the check; that should give you very close numbers.

Your thinner head gasket should close up the PV clearance by that same amount.