I have a complete set that I think I have sold to stovebolter-friend.

The Truckstell unit was made for cars and had a "kick-down-pedal" (Tip-Toe-Matic). On a truck you have to fabricate/cob a hand engage/release.

You have to cut throw the torque-tube and driveshaft (I think) and then clamp the Truckstell unit to the front end of the cut-off torque-tube and driveshaft (I think). I think that I have the installation instructions as a file somewhere.

http://www.chevytalk.org/fusionbb/showtopic.php?tid/175613/
https://www.ebay.com/itm/Truckstell...ual-for-Chevrolet-26-pages-/151703445195
https://www.jalopyjournal.com/forum/threads/truckstell-overdrive-model-101-vs-103.783592/
http://www.oldchevytrucks.com/blog/index.php/2011/02/1950-chevrolet-deluxe-ton/

https://books.google.com/books?id=G...0overdrive%20for%20Chevrolet&f=false