440 oil pan?
you mean do tell about high volume and high pressure pumps?
honestly the majority of my experience is with street and pretty mild engines, so i have never used anything but standard pumps.
i have never had an oil pan pumped dry in a car, but some people insist that they can be. but the reason for that would be the oil from the engine not draining back to the pain quickly enough, so without really having a specific number or formula, i would imagine you would at least want to make sure your pan holds enough to make sure the oil drains back to the pan before it's pumped out, but that's still only if you're going to be spinning the engine up high then letting it come back down. it seems to me at sustained high rpm you would still have to do something about the oil draining down more quickly. but i really doubt most of us here are doing that kind of revving, especially with a 440.
more experienced race engine guys here can correct me if i'm wrong. but i know tolerances on a race engine are much larger than on street engines, requiring more volume to make sure the space gets filled with oil. but at the same time, with the increased tolerance should come much increased flow, meaning quicker drain down, meaning no dry oil pan.
as far as increasing the oil pressure, if you aren't increasing tolerances, and your bearings are good, do you really need more oil pressure than stock? it may not matter to the bearings and metal parts in the engine, but i would be worried about certain seals not holding up to significantly increased oil pressure. it may be unlikely, i can't speak for everyone's engine. but i would always be afraid something like my main seal or distributor O-ring would blow out and i wouldn't realize it until it was too late haha