Hey folks,
I'm in the process of getting ready to fire up a completely rebuilt 1962 chevy 261 engine and while priming the system with an old distributor shaft, I noticed that the only place oil was coming to the top of the engine was through the middle of the rocker stand, and doesn't seem to be distributed either direction away from the center. There is a good 40psi of oil pressure, but my worry is that something is hindering the distribution of oil throughout the entire rocker assembly.
What could be going wrong here?

-Nick