70 PSI is way too high, the pressure relief valve in the oil pump will open, or should, well before that. 20w60 is pretty thick, too thick for most cases, imo.

The factory minimum for warm idle oil pressure is something like 12 psi. Idle oiling requirements are fairly low, that might be why you aren't seeing oil at that rocker.

That all said, I think maybe your problem is the wrong shafts. I cannot remember if the W2 rockers have the oiling holes relocated for the offset that W2 rockers have. I suspect that is your problem.