Just agreeing with most of what's been mentioned already. I use a crank scraper instead of a windage tray in my race car. Most Stock class racers also don't use a tray. It can trap oil between it and the crank, which is why drilling extra holes and bending open the "vent" windows further is helpful.
If you'd like more info on crank scrapers, you can check it out here:
http://www.crank-scrapers.com/Chrysler.html