As I remember the procedure, you put the 4.625 ring gear on the starion carrier/lsd unit. You have to swap the spacer from one side of the diff to the other, which will usually get the side gear adjustment range in range of the right contact pattern. This is because the pinion gear tooth counts are different, and thus the pinion gear diameters are different. You mostly don't have to fiddle with the pinion gear install height as the ring gear diameter is unchanged, and you still have a matching gearset. You may have to fiddle with side gear adjustment some. Not having to fool with the pinion gear takes out 80% of the headache of setting up the diff and the need for a bunch of special tools.

I'd do the spring plate swap for friction disks as noted by Kevin. Not too tough to do.