I've used that plastic Summit windage tray. What I like about it is that is has an integral gasket. I didn't think it had enuff louvers, so I made more with a torch and a knife. I have not heard of any dyno testing on the Summit tray, so who knows if it's any good?

A little windage tray trivia: (non-Mopar, so the faint of heart better hit the back button now) By the late 1920's the Duesenberg brothers had 15 years of successful racing experience. Their cars/engines had won the Indy 500 3 times, and they were the only American car manufacturer to ever win the French Grand Prix at Lemans. So they knew what they were doing. Yet I was surprised when I pulled the oil pan off my '29 Duesenberg to find a windage tray. It had a shape formed on one side to gather the oil and send it down thru holes, thru a screen, into the pan. I wonder how long they had been using windage trays, and how much of an advantage it may have given them. Their most successful competitor was Miller, and I don't think that the barrel crankcase of a Miller (like an Offy) would allow for a windage tray. On the off chance that anyone is bored, here is my painfully long and poorly produced video of the oil pan windage tray removal. https://youtu.be/jpIxtB8zfC8