Sorry I have not had the chance to get the information back to you, thing have been busy here. to put an automatic behind your diesel I would imagine it would need to be an overdrive unit, all ford overdrive that I know of are electronically shifted to put one in a truck that was not equipped with one from the factory you will need a controller
The US Shift Transmission Control System like this one. the only 4 speed trans that I know of that is not electronic is the GM 700R4, but GM normally has the drop for the front differential on the opposite side as the ford, and once you buy the parts to change the transfer case it would be cheaper to use a ford trans to start with and buy the controller.