Sean,
Backing up the discussion to the differential, I noticed that I have some extra parts that don't appear in your photos. I recently had my differential apart and found that I had shims on the heads of the half shafts. Did yours have any?
Not sure if you need them or not. Being that this was my first rebuild, I just replaced them with new ones. I did do some research but couldn't find anything definitive about them. Maybe a couple of the more knowledgable members could provide some insight as to whether you need them or not.
FWIW, my differential is a 126. And, the new ones I bought from VdL fit on one shaft but there wasn't enough room for them between the head of the half shaft and the nuts on the other side. So, I reused the old ones on that side.