Well I got 1 of my 2 4.2's built today, combined in both kits I had 1 unthreaded rear axle, I was short 1 thrust washer for the ball diff and I was missing one of the bags with the plastic nuts to hold the shocks on and the lower shock bolts. I called AE and they are sending them to me, hopefully soon! Just in case I ordered some extras for the parts box.

I watched a few vids on youtube about building and setting up ball diffs and I think it went pretty well for my first time, I plan on running it a bit tomorrow to see!