I can also attest to a leakin' door on a '93. The passenger side is fine, but the drivers side is bad. When I wash the truck, the seat gets wet! There is a large gap at the top of the door, but I can't move the top in any further. When I got the truck, the first thing I did was to replace the lower hinge, but found that the plate the hinge is mounted on isn't connected to the door on one side, its broke. Maybe it can be welded, but I don't know. With that new hinge, the door opens and closes with minimal effort, but I don't want a water leak! I wish those engineers at Dodge would of come up with a better design. My old '88 was the same.
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'93 D350 2wd Club Cab 5-speed, 131,000 miles, Amsoil throughout, Borgeson Steering Shaft,K&N