I have a M20 Muncie 2.56 1st gear, stock rear gears is either 3.36 or 3.52. This is something I want to change anyway to a 3.73. I just noticed that Cliffords recommends the 40 IDF for the 264 cam so I figure that the 270 would be the same or more. I don't don't have any lean problems but thought the air volume might make a difference. I also have a 390 Holley I thought about trying just need to get the plate.
