8 3/4 vs 9 3/4

Two reasons to not use the truck rear are the tubes are extremely thick, about twice as thick as a passenger car rear and secondly if you don't have a case spreader they are a real pain in the *** to set up. Even if you have the spreader the side bearing preload and backlash adjustment is done with shims, still a pain in the ***.

This is what I would do if you can swing it, buy a Strange S60 housing and axle package. You can order it in any width so you could narrow it for additional tire clearance and wheel options if you want. This housing comes with side bearing adjusters for easy setup. Buy the truck rear and use the trac loc and gears out of it. You can get the housing with leaf spring perches already welded on and the Mopar ends. You can use the brakes off your 8.75.

Some of those truck rears had 30 spline axles so be sure to check that before you order anything. If it has 30 spline axles you can use the axles out of the 8.75 if you don't narrow the rear.

The S60 housing with ends and leaf spring mounts will set you back about $670 plus shipping. It also has the snubber mounts on it that the truck rear lacks.