You could go with a syncro three speed. If you want to keep a four speed, the best fit for keeping the torque tube would probably be an SM420 (1948-54) with the torque tube bell. You will need to modify the bell housing (machine out) to fit the tranny or use and modify a bell housing from around 1950 to support your clutch and brake pedal assemble. The SM420 is about 2" longer than your old crash box tranny, so you will need to shorten your torque tube and propellor shaft.
Doable but not a weekend project. This assumes a 1/2 ton. 3/4 ton a bit different.
Last edited by Donf; 12/09/2014 4:33 PM.
