[blucar]

The installation of an OD in a torque tube type of drive-line is a pretty rare application.
I knew a man in Idaho in 1950 that had one in a '41 Chevy coupe, the OD was in the car when he bought it.
About two years ago I saw a '50 Chevy for sale at the Pomona Swap Meet. The car was a mess, needing a complete restoration, however, the OD unit was complete, installed in the drive-line close to the differential..
I would make a guess that BW had an installation kit available to install the OD's in torque tube drive-lines, thereby making the application user friendly.