lost oil pressure

Okay first off you are turning the oil pump shaft CCW right. If everything was good the drill should start grunting after only a 1/2 dozen turns as the oil pump starts to build pressure. If no pressure the 2 cheapest checks are first to pull the valve covers and check that all the pushrods are in place and you can look down through the head casting openings and see the tops of all the lifters. If everythings good then next is to drop the pan and check if the pickup is loose or the screen is plugged. Third pull the oil pump and check that the relief valve isn't stuck open. Fourth $$$$$$$$$$$$$$$$$$