So that's what you've been up to all this time? Causing headaches for yourself?
Obviously you can tear it out and put in a chromolly torsion housing. You also could probably plasma out the nut (or threaded deal) in there right now and weld in a new one. Or you could cut out just the inner pivot housing and weld in a new one (ie IRS conversion kit). Maybe retap to a larger thread and have some new bolts machined (assuming you can't find the ones you would need anywhere off the shelf).
Maybe someone else will post up a solution that offers a simpler, more intelligent approach but these are all the most viable ones I can think of. I wouldn't think it'd be very plausible getting a nut on the end of the bolt somehow...?
What if you fabricated something that would just hold the bolt on by pushing on it from the outside? Know what I mean? Not really the "right way" but no reason it couldn't work.
yea ive been trying to get her ready for the season after takeing a hard slam and bending some stuff. i f-ed up big time on the rear tho. i hate the stock design so stupid. im gunna cut it of and add a nut that i ground down to fit in the bushing sleeve but the pain in the ass is its gunna be difficult getting something in there small enought to cut the old one off.
I had the same thing happen to my 5-16. All I did was cut a hole on the inside of the frame horn big enough to get in there. The nut is just tacked on the inside you could pick up another nut, cut the old one off from the inside and then weld the new one in. Then weld the hole back up. Before you weld it up put the rear end together to make sure the camber and toe is correct. There could be enough slop in the pivit that a little bit here or there could be alot on the tire. It was actually easier than I thought. Much easier than replacing the pivit because I had to do that too.