Inspect the 2 rubber fuel return lines. The location is on drivers side and under the injector pump, connecting to the fuel lines on the frame. Kind of ***** to get to, but not too bad do it yourself job. My 96 dodge had crusted rubber return lines that ended up leaking. Rubber lines wore out at 170k. Easy cheap fix, but dumped 1/2 a tank on the road before I realized the problem.
Like everybody is saying, fix the KDP. I fixed the KDP by buying the tab and installing over the dowel. Required removing the fan and front timing cover plate. Make sure you get all your motor parts from Cummins and not Dodge. Dodge rapes you on motor parts prices.
Steering is wimpy. If your truck wonders, You can buy lukes link, or a new track bar, and a bar assy that reinforces the steering gear box. My truck had tight steering and 0 wondering after I installed them. (bad dodge design).
Inspect front u-joints. Factory joints do not come with zerts and are good for about 80k (if that). If joints are sloppy, get them replaced ASAP. Replace with U-joints that have Zert fittings so you can maintain them.
Check both front and rear brakes. Dodge eats brakes.
Love the Cummins, dodge chassis is just ok.