Dodge 2WD 1994-1997 for the mechanical speedo. I have heard that later years will work, but haven't confirmed it. You could use either the diesel 2WD or the standard 2WD transmission, but there will be a little more work in using the diesel.
I am unaware of any GM NV4500 that could use a mechanical speedo pinion, including the early 92-93 units with the lower 1st gear.
