Here's a really out side the box front end build up for you: Use a '79 Ford HP 44 center cut to waggy width and using Waggy inner shafts (chromo replacements for better strength) Use '74-'80 Dodge outer flat top knuckles they are a flat top knukle with a rebuildable unit bearing, and 5 on 4.5 bolt pattern. Now if you want to have manual hubs instead of the unit bearings MileMarker makes them and they are cheaper than the Jeep hub conversions.
Since the early version of the unit bearing is rebuildable in the full-time 4wd for Dodge in the mid-to-late 70s, would you happen to know if its the same for the military version? Dodge supplied 3/4ton trucks to the military. They were full-time as well. 8on6.5 and possibly D44s. I don't know for sure which diff housing they had. But having a flat top knuckle and rebuildable unit bearing in the 8on6.5 may be another option.