Gef is gonna be the guy, one of the leaf spring pads has a bad location hole in it.4-1/2” BP 44” center to center on pads but photo shows bad locator hole.
I have one in Michigan if you are interested in traveling.
Complete w/ 3.23 open I would freshen it up before use -seals, bearings,gear lube, brake parts $200.
I can send pictures later if needed.