Oil line plug/ low oil pressure on cold starts

Trust me. The plugs are in place. You'd dang well know if they weren't. Can you describe the pan to pickup position? The pickup is supposed to be an interference fit with the bottom of the pan when the pan is assembled. in other words, the pickup is supposed to be touching the bottom of the pan. That's how it's designed. Other than that, you probably have some bearings with some normal wear. It's not a terribly long time before it gets pressure, but it take a few seconds, doesn't it?