Well, 7 Youtube videos and 3 hours later I know a whole lot more to universal joints circa 2014.
WeberAuto put together a VERY comprehensive playlist on the subject.
What I came away with:
1) Non-greaseable are better than greaseable. This is not because of crossbar strength, but due to bearing cap design differences.
2) Spicers are probably the ones to go with.
3) Spicers come pre-lubed and ready-to-go.
4) The fiber-reinforced-plastic retainers should preferably be sheared off, but if melted out should be thoroughly cleaned out.
5) The cross need to have ~ .002 [in] of play.
6) Outside-snap-rings are now color-coded by thickness.
7) Bearing cap straps are supposed to be one-time-use.
8) I really want J-9522-3|5 U-Joint Removal Tools.
What I still don't know.
1) Do the inside snap-rings also come in various thicknesses?
2) Proper method to install inside snap-rings?
2) Where to buy a J-9522-3|5 without getting charged an arm and a leg?