1977 Ford Bronco rear ended 9" rebuild

[broncosbybart]

Yeah, I recall that. I'd remove the shims and just change the perch angle. You can remove one and tack a new one on at whatever degree you want. Angle finders are cheap and necessary. I wouldn't weld the perches fully until final mock up. You want the pinion a degree or 2 lower than the driveshaft angle. It isn't hard to do just takes time and attention.