Try checking under full size vans, they tend to be narrower that the pickups. I know for sure that one from a '70-'80s (maybe even newer) Dodge 3/4 or 1 ton van will fit. That one would be a Dana 60, and a 3.55 gear is common in them. Just be carefull on which one you get, as many of them are semi-float instead of full float like the 14 bolt. Same goes for looking at Chevrolet vans, especially the G20 8 lug. There's 2 different 14 bolts, a 10.5" ring gear full floater, and a 9.5" ring gear semi float.
