440's yea, SB's no.
A windage tray with a stock depth (Key word, depth) is 15 free HP on a absoultely stock build.
Open up the louvers to be level with the pan rails for best drainage.
Deep pans have little to no need for a windage tray unless theres some serious truning goin on. Oil splashing up is an issue for a road racer, and there pans are baffled as such to handle it. It's not really for a drag racer since there pan is very deep and is baffled for extreme G take offs.
but these are deadicated pans designed for that useage. If your useing one, no worries. Stock pan, free HP. I'm useing one on my zero deck 360.