If I recall the stock windage tray was designed for the 340 and helped it out some. Using the same tray under the 360 with its longer arm throws is too tight resulting in the "oil cloud" being trapped around the rotating mass. That is my understanding anyway, hopefully some more knowledgable racers will chime in.

Some book I read way back had an suggested windage tray to rotating mass clearance and the stock 360 setup is no where close. The milodon tray is made to use with aftermarket studs made for their windage trays (milodon or ARP have them) which allow you to adjust the height of the tray using a nut abive and below where you want to set the tray. May want to look into that setup if you want to have one in your engine. The Milodon tray doesn't cover the front two rods since most stock oil pans don't have enough clearance there for a lower tray.