Great thread and links!
I have a XJ and bought a MJ (2.5L 5 speed 4.10 axles) a few months ago. I'm thinking about using my XJ C8.25 rear axle (4.10) and using it in the rear of the MJ so I will have a SPOA lift already since my XJ is getting a 8.8 rear axle. I can also use my new shocks off my XJ (Good for 4.5-6.5" lift) since I plan to upgrade them. I will have to see if the C8.25 axle uses the same E-brake set up and if so order the longer cable. Using the C8.25 axle do you see any other item that I may be over looking?
I'm not sure what the importance is but on my D35 rear axle there is a ball looking thing bolted to my diff and another bracket near it but not connected.
Then lift the front with coil springs, track bar, and longer UCA/LCA's and that should get me close to being done. Until I can get LCA brackets, a solid axle and delete the vac on the front D30.