so I think I've got too much weight for the 35YO rear long side, I picked up a full floating Elocking FZJ80 axle complete, stripped its mounts and have put some time into engineering the rest of the install...
now, the 80 axle is 7" wider than stock 56" wms to wms. It is six inches wider than the fronts. It will clear stock BS wheels(3.5") @ 15" with minor clearance of the caliper bits... 3" of rear to front offset is too much IMO for a daily driver/ capable rig, and I thought hard on 3" spacers, but can't do it. I thought about a narrowed rear axle and a custom shaft with locking plate. the last option would leave my front axle untouched-as is- in need of some attention...the other option is to get a wider front axle, ala FJ60 and then run 1.5" spacers. But then I'd hafto out board the front springs or notch the diff. I want to say that I'm inclined to hate any option ith spacers for no other reason than scrub radius. I've thought about differing offset of wheels front to rear, but then I'm carrying 2 spares as it's a daily service rig. the right way to do it, is to either narrow the rear(about $700 all told, and no gain in track), or to extend the front. Extending the front would involve at least 1 custom shaft, and 1 1/2" spacers, as extending the short side too far would push the diff into the pan danger zone. It would also require relocation of the axle housing spring hardware. the other option is to bump out both left and right side 3" and to use at the very least an fj60s left long inner, both birfs, wheel bearing hubs, and lockouts and a custom short side shaft. only other op would be to use 30 spline super birfs and custom longs, one custom cut, the other being the same length as a 60 series long side. Either of the last 2 options keep the perches in the right spot, and since I'm going to keep it spring under, it'll bolt up w/o any other mods than the extensions and some gussets...
I will be building this axle here, from either a 73 FJ55 housing and 77 disk brake/ steering parts, or an FJ60 housing and parts depending on availability. I already have cut a knuckle ball out and have extension tubes en route. I still need to get my Auburn LSD to Georg, as I want this thing to be right. I am sort of inclined at this point to go ahead and use the 55 housing and just get the longfield 30 spline kit with a custom short side, as I'm already in a simple full float swap wayyy beyond any kind of budget

the goal is to bear a load, without a road

pics to follow...