Got it done this morning.
Initial report: It works great! temp gauge was right where it needed to be, 12 o'clock as opposed to right at the 1/4 mark where it was. Heat was obnoxiously hot. I'll report back after a tank of fuel to see if it improved milage.
The How to:
Items Needed:1. stant thermostat
2. gallon of coolant to replace what you are going to use
3. 2" hose clamp
4. a screw driver to tighten the clamp
5. pliers or a hose clamp tool.
6. 15 minutes.
Procedure1. Open hood and remove engine cover
2. Locate radiator hose going to thermostat. It is on the passenger side of the engine, right underneath the intercooler tube.
3. Disconnect radiator hose clamp. I have a tool designed for this, makes it easy, you could use a large set of pliers as well.
4. Remove radiator hose from thermostat housing. You will lose a bit of coolant, but not much as long as you immediately tip up the hose.
5. Remove radiator hose clamp and set aside for future use.
6. Insert thermostat into radiator hose, with the bulb facing towards the engine, bulb slightly (1/4" or so) protruding. You can't get more, as the hose won't go back on the housing. To get the thermostat seated fully, I used a screw driver and a hammer and LIGHTLY tapped it into place. If your rad hoses are old, this will be more difficult.
7. Place the worm clamp on the hose, around the wide part of the thermostat and tighten. I used just a plain 2" hose clamp. You can get fancy if you want.
8. Put the rad hose clamp back on the hose but don't tighten it yet.
9. Place the rad hose back on the thermostat housing and tighten the rad hose clamp.
10. Top off the coolant with an approved make. I used zerex g-05.
11. Put the engine cover back on and fire up the jeep.
12. Take it for a spin and watch your temp come back to what it should be, with a smile on your face realizing you bested the OEM's price by over a hundred dollars!

*edit* after driving for a while, I saw the temp spike, then settle. So, I pulled the hose, drilled a quick 1/8" hole in the skirt and put it back together. That fixed the spike, without affecting the thermostat.