That closed knuckle part answers a lot of questions. It probably did come out of a Wagoneer along with the rear axle. They would be '73 or older and the front axle will be a Dana 27, which would have closed knuckles. Beind '73 or older also is why the rear 44 is five lug. The front axle is a boat anchor. You'd be money ahead to find a '74-79 Waggie Dana 44 and convert it to five lug to match that rear axle.

Don't get in too much of a hurry to change the rear corners. Flex the suspension before doing any work to see where the axle might hit if you do return it to stock. I cut my corners out like that after moving the rear axle back. The previous owner may have done it for the same reason. There are a lot of rockcrawler types who would love to have that tub as it sits right now BTW.

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