Just did a complete engine rebuild on the 4.7l. Tried to start her over today and found I need a fuel pump. Truck sat for 9 years so I can see why. Anyway, I rebuilt the engine top to bottom so I was looking at the oil pressure gauge religiously when I was cranking and wasn’t moving at all. Will the gauge show oil pressure when cranking, if so how much? Just has me worried. As far as I know my engine work is good... did not replace the engine oil pressure sensor at the filter, so I may change that also real quick. I can also try a manual gauge somewhere. Just want to know any insight in the meantime while I wait for my fuel pump to arrive. Anything would help. Thanks!