Found the pass-side casting: 389770.
TSP, you bring up a new investigation. I had been going off the assumption that this was a 2-ton 6400, but that engine number points to 4400. Though my 4 rear tires are not factory, the "G: Outer wheel tread" measurement is closer to 76 than the 79 of the 6400. What other things can I look at to solve this mystery?
No door tag.
