There are some issues with the Getrag manual 5 speed trannies in the first generation Dodge/Cummins. Many convert them to the newer NV4500 (I think that is the right number) 5 speed found in the later pickups when the Getrag dies. I guess you can't easily get parts for the Getrag or something like that. That is something you may be on the lookout for.

In fact, I all but had a 92 Dodge bought, but the tranny went out while the guy was delivering it to me. I already had an appointment to look at the SDL, so I ended up getting the Benz rather than messing with the cheaper, but needing-work Dodge. After one year and roughly 4000 in parts and labor later on the Benz, I often kick myself over that deal.

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Keep everything as simple as possible-but no simpler--Albert Einstein