I made a pressure tank, like Walt Dupont had once suggested here, to hopefully get some oil circulating to bearings prior to spinning the engine with plugs out. I also pack the oil pump gears with Vasciline to help get the pump going. I was actually able to get a few psi indication on the mechanical gauge by hand turning the engine at the front crank pulley bolt using a 3/4" drive socket, extension and ratchet. Once I saw this slight indication I cranked it with the starter and got a 30-40 psi reading. I know Henry never did all this at the plants on a new engine but when I have lots of $,$$$'s invested in a rebuild, I prefer to make sure I have oil pressure before start up.