RE: u-joint replacement
I did a complete rebuild on the front end of my '99 1500 QC 4x4 about 4 months ago. It was a bit difficult. I don't have a writeup for it nor did I take pics because I'm an idiot, but there are a couple of pieces of advice I can tell you:
1. When you do the job, you need to have access to an impact gun or be Hercules.
2. When you remove the three bolts that hold the hub to the spindle, you can tap each of the 3 bolts to push it out once you've loosened them. Those !@#$% bolts are $10 a piece (ask how I know), so either be prepared to pay $30 for new bolts because you are going to waste the heads on them, or waste just one of the bolts by moving it from one hole to the next.
3. Get regreaseable u-joints. The grease joints that you will see require a needle type grease fitting that you push inside the joint.
4. Have patience because it's time consuming.
If you have any other questions, ask. I'm sorry I cannot be of more help. I did the u-joints, all four ball joints, and all of the tie rods and ends as once. Total cost of parts: $400. The labor would've been over $1200 if I brought it somewhere. I wouldn't recommend EVER doing ball joints on a 4x4. I hate them.