Could it be done? I have been contemplating quite abit. Build an adaptor to fit a SM465 behind a TH400 tranny. Think of the gearing possibilities. I figured you would not use the bell housing and would have to shorted the input shaft on the 4 speed then either make a coupler or something to mate them. You wouldn't need a clutch cause once you pick a gear you would probably stick with it and you should be able to change gears at stop or slight roll. With that combo you could put like 3.50 axle gears in and for highway use 4th in the manual box for an OD and use 3rd as a slower/ normal driving speed gear. Do you see any complications one would run into putting that together? Thanks.
