Oil pan help: stock or no?

[rubberbandit]

So I am doing a rebuild on a 400 sbc (400+ HP 3.75 in. stroke, 5.7 inch rods) and am wondering what portions of the oil system I should replace and what I can reuse.

Pan: can I use the stock or is there a better suggested pan? The truck has a 2" drop if that makes a difference
Windage tray: do I need one? If so what type is best?
Pump: old stock or stock replacement? I dont want high volume or high pressure
Pickup: help here too
any other things like studs, pump shaft, etc.

I have all the old stock components but what would you guys replace? What usually goes out on these engines in regards to the oil system? I want it long lasting. It will be a daily driver (prob no strip use). I don't mind buying something if it means it will last longer than what I've got.

As always, thanks again for the advice