Seeing as I plan on 35's for the DII, it was upgrade axle time.
Yeah, I could have got off the shelf stuff, for @$3500!!! HD axle shafts, regear, lockers. That's nuts.
Picked up a pair of FJ80 axles last year. Correct drop for the DII, full float rear axle, strong enough for 35's all day, stock 4.10 gears, selectable lockers front and rear, tons of aftermarket support from more than one vendor. All told, $1800 for the pair with wiring harness, radius arms, etc.
Ground off all the brackets after some measuring, nothing would line up, oh well.
Going to go triangulated 4 link in the rear, triangulated radius arms and a panhard bar up front. Simple, proven, easy to build strong.
While waiting for parts, I made the truss for the rear axle. The upper link arms will weld to the top of it, and I needed a stronger foundation than just the diff housing (not to mention it's offset).
Slightly overbuilt, using 3x2x1/4"wall box section, then plated the ends with 1/4" sheet.