Oil pans
A good windage tray (Milodon) will help you get 5-15 HP by directing the oil away from the crank and into the pan. If you're worried about not having a large enough pan to the point that you're robbing the oil pump during hard acceleration, you can use an analog (needle) pressure guage to watch your actual oil pressure during your next hard run down the strip. If you do go to a larger oil pan obviously you'll have to extend your pickup and doing this while your engine is upside down on the stand is the easiest and best time to make the change.