Re: 1975 WAGON QT conversion
This is very doable.. as stated you will need to completely disassemble the TH400 and swap to the tailshaft for the 205... the QT uses a unique LONG 10 spline shaft.
One other thing to consider is the driveshaft in the rear... the QT is offset to the pass side... so is the rear Dana44... the 205 has a centered output... make sure your shaft will clear the fuel tank. If the 205 is longer than the QT, you may run into problems with the shaft.
Also... you will have a compound angle on the rear shaft... vert offset and horizontal offset...if you get vibes, a CV may have to be added.
I swapped from the QT to a D20 on my 78 and needed the CV