97 Dodge 2500 diesel known problems?

4bearhug wrote:
My son is looking for a older truck for work as has found a 97 Dodge 2500 w/ Cummins diesel that might be in his price range. I thought some of you might have some idea what likely repairs he would have or the owner has already done? This would give him some idea what he might be expecting down the road. Truck has 133k miles. Also if you have any idea of estimated costs of potential repairs, please share that as well.

Thanks for your assistance. I know there are quite a few Ram loyalists on here.