I don't have adjustable rockers, but I did check all 16 valves with a adjustable push rod they are all .030 + /-
None of the valves stay open. with the valve covers off I was checking the travel of all the rockers to make sure my cam wasn't going away.
I watched every valve close in a few seconds!
So it only has to sit about an hour and it clatters for a couple seconds until it gets oil pressure.
Otherwise it seems to run fine and will rev to 6000 rpm no problem.
However it shakes at an idle more then I think it should.
With timing at 22 initial/ 34 total
It has 12.5" vacuum @ 750 rpms in neutral