The Stovebolt Site Forums The Shop Area Engine Shop Was an 3spd OD available for torque tube rears?

Borg Warner overdrives were never built to mate to a SM420. If you have a 3/4 ton, you will have 4.56 rears with an open drive shaft at the rear. Why not find a 55 or later Chev 3 speed with an open drive shaft already on it The 4.56 will be very drivable with the .70 OD and the only thing you will have to modify is the drive shaft which is quite simple.