If you are going with a T5, consider a third member swap from a '55.2 to '62 1/2 ton axle.
If Im looking for a differential from a 55-62, does it have to be 2wd? Or can it be 4wd? All the 4x4s Ive seen in this year seem to have a different style axle, so Im guessing its 2wd only?
-Nick