All slapped together & ready to go back! I'm putting the slip yoke back onto the outer shaft first, and then stabbing the inner (with my new snap ring) into the diff as I lift it into place. And I'm putting the RightStuff on the axle beam instead of on the 3rd member.

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Unlike most Lincoln-lockers I've seen, I didn't weld the spider gears or pinion shaft in - only the side gears.
***UPDATE***
The first weld job (by an amateur friend) lasted about 50' of wheeling; the 2nd job (by a pro) lasted about 20'; so I gave it a try myself (less than an amateur), and so far, I've broken a u-joint & 3 hub locks, so it's holding now.
***UPDATE***
I got tired of breaking parts, and getting stuck. So I'm back to wheeling 2 open diffs again, and having far fewer problems off-road.