[83GMCK2500]

In addition to oil pan, I would put new o-rings in the filter head and take a look at the oil cooler lines, if equipped. I'd probably remove them, take them to a hydraulic shop and have them build a replacement to the rubber/flex portion and just put new o-rings on the ends that clip into fitting on block/filter adapter.

Flush the power steering fluid, if it hasn't been lately. I added a magnefine filter to the return side of my power steering line.

Regarding your questions:

1. The wheel bearings are sealed/non-greaseable.

3. Contact one of the steering box rebuilders, Redhead, AGR, etc...

4. There is a flaming river (generic available as well) universal joint that will delete the rag joint altogether, firms up steering feel quite a bit, but may transfer some vibration.

5. Yours are 26 years old now, I'd imagine the body mounts are due to be replaced.