Yes I finished the rebuild last summer, it's been in the truck now for ~5,000 miles, no issues, working great. Just did about 1,500 miles last week to Big Sur and Tahoe. Changed the oil a couple months ago and looks good, so hopefully I'm in the clear. Not leaking either, the Permatex anaerobic red stuff seemed to do the trick.
With CDL, front/rear locked, and 35s now, she's a completely different truck! Sorry no more video or install details, I got lazy on that.
I didn't end up doing the ATB. I put in an HD cross pin and 1.4 gears from Ashcroft, and of course, CDL. And new timken bearings
Didn't really notice any difference going up hills with the 1.4's in. It got a little better with 4.12's and 35s, but its still a bit of a dog up hills (like climbing to Tahoe)
Overall it was a little more challenging than rebuilding the engine, mainly due to the special tools (you really need a couple LR tools plus dial indicator base to do it by the book) and precision needed to get the preloads all correct. You could probably do it by feel though and get away with it
With all 3 diffs locked I'm not sure what real benefit an ATB would be. An underdrive, on the other hand...