The 340 and 360 windage trays were not the same, but the Mopar Performance windage trays fit both. The 360 main bolts are spaced farther apart than 273, 318 and 340 main bolts. The Mopar Performance windage tray had slots instead of holes so it would fit both. There is a benefit, and I run one in everything I build unless you have a real race pan. That is not a real race pan.
