I'm sorry but you are just dead wrong.
You can't get the inlet side big enough. There are published tests out there. That is why the Milodon SS pan had a rear sump and the big single pick up in the cover. If you are going to wind it up, you need to use the big tube in the cover and a second pickup that is 3/8 and goes into the original threaded hole in the pump.
You can't suck the pan dry unless you have no oil control. It's practically impossible.