The sleeves available for the N Ford tractors today are mostly the 3.268 OD (040) and the 3.368 OD (090). My question is was there ever a 3.309 OD available? The reason I ask is a few years ago a Flathead Ford v8 engine rebuilder gave me a bunch of new sleeves with the 3.309 OD and the 3.1875 ID ,he told me the v8 sleeves he used did not need the counter bore. I thought I would ask the experts on here. Thanks very much.