The only trouble I had with my 126 was getting the new bushing screwed back into the tube. I almost stripped it. The problem is that the spring causes the suspension to change position when you take that joint down. It is really hard to get it all lined back up with the spring installed.
Another tip....measure the distance between the tube end and the joint mount before you take the old parts out. I measured the length of exposed threaded rod which was a mistake as the new parts were built a little different.
I would recommend having the old joint mount-to-frame bushings replaced at the same time.