195.6 OHV No Oil Pressure

The engine a 195.6 OHv original to the car,  is now reassembled and back in the car.  I did not tamper with the oil pump or bypass valve and the engine had good oil pressure before I removed the pan and crankshaft to correct a bad rear main seal leak.  Found that the rear main bearing especially was deeply scored and replaced the crankshaft and bearings because the rear main journal could not be cleaned up at .040 undersize (which was the biggest bearings I could find).  So I replaced the crankshaft with a .020 undersize crank I had here at home and of course new proper sized bearings. 

The engine is assembled and back in the car.  I packed the oil pump with petroleum jelly and tried to pre-oil the engine with the spark plugs out, fresh 10w40 in the pan and using the starter to rotate.  Zero oil pressure, as checked by a new gauge.  Bummer.  Repacked the oil pump.  Spun the engine and still no joy.  

I have a bare block here at home and looked for the places where I may have left something unplugged or left an obvious internal oil leak.  I am thinking maybe something under the timing chain cover, especially the oil gallery plug on the front of the engine.  I thought I inspected everything but now I am forced to check.  I know I snugged up the oil pick-up tube correctly and it was clean of any debris.  I have been there before.  I pulled pressure line feeding the oil filter and when I spin the engine, there is some oil flow out of that port but not enough, evidently to generate any pressure so maybe the pickup tube is contacting the bottom of the oil pan.  I mention that below.  

Color me frustrated.  Oh when I looked in the oil pump the second time to repack it, just a trace of the pj remained so the pump is turning and presumably pulling at least some oil out of the pan, but the pump itself did not drip a lot of oil when I opened it up.  

So two possibilities:  something under the timing chain cover is open, or the oil pickup tube is flat against the bottom of the pan.  My engine did not have a washer or spacer separating the pickup tube from the pan and I don't think I installed one. 

Joe

well vaseline's a lousy lubricant, but there's not much of it, and it has terribly viscosity index, so it dissolves in the hot oil. and for new-engine-breakin, the first oil, with all those break-in additives, isn't in there for long. 

it's also the method that the factory recommends, though that was the 1950s/60s.