On my 55 v8 265 I just pulled the heads. It did not look like any oil was getting through the lifters and rods. Not exactly sure how the oil flows through the engine and all that works. I have a priming tool but do not think it works because the distributor has a channeled part that oil travels through but the priming tool does not have that. When I was turning the engine over with the starter (while still assembled) the oil pressure did come up. It still has the origiginal copper line that connects to the back of the block and goes to the dash. Is there anything I can do to make sure it is oiling before putting everything back together?