Cam degree.

"Found and checked TDC several times." No I haven't been using a piston stop, but a calibrated dail indicator. I have even used the "Dutra Method" of degreeing the cam. Using the cylinder head with valves and springs installed in #2 cylinder head chamber the set on top of #1 cylinder and bolted down, this allows #6 piston to be exposed to find TDC and once found, Install the degree wheel and pointer, use a drill bit or hex wrench .010 bigger between the head and #6 piston as a stop. You then install the lifters in #1 and the push rods and rocker arms. Set the lash. No dail indicator, nothing, lift movement gets checked by lack of or of tension on the push rod. IMOP kind of crude and I didn't get the numbers required. I'll go at it again tomorrow. Maybe I'll get lucky and it will fix itself and I'll never know how it did. Happens with airplanes all of the time. :BangHead:
Norm

I bet that's where your difference is. The piston stop is really the most accurate way.