[blucar]

My '36 had a Columbia from new.. It worked rather well, however, I did not care for the shifting controls.
After driving the car for a couple of years, ('52-54), I up-graded the rear end to a '42-48 Columbia with the '42-48 vacuum/electric controls..
The '42-48 rear ends are only 2" wider than the '36-40.. An additional inch on each side is not a problem..
I used my stock '36 3.78 center section and drive shaft, with '37 radius bars.. The '37 radius bars do not quite lineup with the front mount on the torque tube, however, the addition of a 5/8" nut on both sides between the bars and the tube, allowed the attachment bolts to slide right in.. I also used the later model rear spring and shackles which can be noted in the attached pix.
I used '42-48 brakes with '39 drums and '36-39 wheels.. I utilized the sway bar feature on the rear axle, hooking same to my frame.. I also utilized the tube shock mounts...
No machine work required, the whole affair bolted together just as if Henry Ford had intended it to...