I am overhauling a 57 Lincoln 368 Cu In engine.  I  pretty much have it assembled and am now preoiling ths engine with a dummy dist that I have made up. I have a direct reading oil pressure gage and I get 20 PSI while tuning the oil pump drive counter-clockwise using a 1/2" electric drill.  I get oil drips off of the left bank rocker arms but very little oil is getting to the right bank as I do not get these oil drips like I do on the left bank.  I have removed the right bank rocker arm assy and blew air through the overflow hole in the shaft and got a steady air flow out of each of the rocker arm oil holes. ( I couldn't check the first and the last Rocker arm oil holes as I couldn't slide them away from the oil hole.)  The main oil hole in the shaft at the #3 cyl rocker arm stand is in fact lined up with the  oil hole in the in the head.  With the rocker shaft off the engine and I turn the oil pump drive I get oil pressure out of the oil hole in the head.  So  I think I have the oil paths all clear. The only thing I can think of is that I don't have enough oil pressure to get oil over to the right bank like it should be..  The external oil pump is located on the left side of the engine and therefor oil gets to the left bank first.  I know it doesn't take much oil to keep the rockers lubed but I would think I should get an equal amount on both banks.

Any thoughts on this would be greatly appreciated.

 Thanks  RV

rvh