The D50 came with the baby 904 trans, so when I initially installed the V8 904 everything bolted right up shifter linkage, trans mount and driveshaft. I since have slid the trans torwads the rear 2", so I will be making the same mods to the shifter linkage as you. Also had a new driveshaft made up, which I was ok with since I wasn't a big fan of the Mitsubishi U-joints. I did find a flange from a Isuzu/Geo Tracker that bolts up to the diff and holds the 1310 u joint.