I've got distributor out of engine on a 57 y-block 292 and I'm driving oil pump with socket and drill while valve covers are removed. I'm not seeing oilflow to either valve train. I know the oil filter was not filled at the start because I did oil change recently, but I kept it spinning for awhile. I also rotated crank in 30deg increments (cam in 15deg incr) and still did not see flow, on the off-chance that camshaft had cross-drilled holes. I assume the head channels are clogged and I'll need to remove and clean them. How can I do further test to know oil pump even works before I remove the heads? I don't have oil pressure gauge, though I suppose I could put pipe-mount gauge on 1 of 4x 1/4" ports along drivers side of engine, probably the one to the left of the oil filter. Does that sound like a solid plan? Are there other easy ways, maybe just open that same port and see if oil pumps out while drilling? I have no idea how oil pressure changes with drill rpm. Has anybody else gone thru some similar exercise that has advice? Thanks.