Differentials are different? HOW???? I have an 01 with the 360 and it has teh same diffs as a 4.7 equipped one would. there was a before/after pertaining to the front housing but it was not engine dependent.
I passed on several nice Durango's because they had 4.7s in them, I held out for 318 or 360, I got a 360 one. still have 7 years later. coming up on 270K miles, I did swap engine and rebuild the trans at 258K not bad on teh originals..... I still have the original engine, it really dont look too bad. plans are to rebuild that engine for something else.

I recently looked at a nice 01 w/a 4.7, and wondered myself, what it would take to swap in a 360/ besides mounts, trans, wiring and computer.... the T case in mine came from a 4.7 equipped Durango. went RIGHT in. same spline, same bolt pattern. driveshafts matched up. as far as I am concerned the 4.7 was JUNK. (just my opinion)