[Stew]

I also just installed a Mitchell overdrive in my 31 Tudor. I built a rolling mount with two connected dollies to support the rear axel and the front of the torque tube. There are several versions I have seen. This dollie makes the installation much easier.

Also you need two thin wrenches to set the preload of the pinion bearing.
Snyders part # A-4634-T

Regards,

Stew