While you have it out, you may want to consider adding one of these:
http://www.steeda.com/products/cobra...over_brace.php
It's an easy bolt-in (in the car...you don't have to pull the whole unit out) and gives you some peace of mind. I installed one, but all my photos are on my home PC. I also modified (re-drilled) the rear mount so that the differential is 1/2" higher and gives the half-shafts a little more clearance to the frame members they pass through.
You should also consider drilling and tapping the lower case for a drain plug. Randy posted a good procedure for this on SCOF that you can do with the differential in the car. Much easier if you have it out and apart.
-Dean #747