Just rough measurements but the 8 1/4" pinion looks to be shifted towards the passenger side about 3/4". The 7 1/4 currently under the car looks to be closer to 1". I think that will be close enough to not cause problems. Of course, I will have to cut the Jeep perches off and replace them and shorten the driveshaft but that would be true of any rear that wasn't original to an a-body. The Jeep rear has the correct Mopar wheel register diameter also. I'm hoping, but haven't verified yet, that my existing BBP 10" rear drums will swap right over to the 8 1/4" My intention, assuming that everything works out how I think it will, is to make a post about the retrofit when I get it installed. The Cherokee rear thing seems to come up occasionally but usually by people that are using the rear discs off of a newer model. I think that a concrete "yes it will work" answer could be helpful to a lot of other people. A 65-67 B-body rear would have been perfect as they are 59.5 wide which would have let me use the 30mm offset wheels all around but I had no luck finding one cheap with decent gears. An F-M-J rear is also a good width but, of course, most of those came with gearing even worse than my current 2.76's.