The vid is a bit slow....or maybe I'm just impatient. I can understand him not liking the wider front track vs the rear but swapping out the rear is a lot of work vs swapping some wider wheels with a little more negative offset....unless he's looking to swap out the 8 1/4 or 7 1/4 for an 8 3/4. He may have said that in the vid but I didn't make it that far.
I have done a couple or 3 diff swaps, i dont think its that much work. About the same amount of time to overhaul a diff if its not blowed up. I have a buddy that does my driveshaft work,cheap.