I just get a can of A/C Pro with the gauge and the hose and follow instructions. Used one can 2 years ago here in Texas on my 2004 Ram and my TJ 2.5 and still blowing cold.
Stock TJ SE 4 cylinder almost certainly going to be 4.10 gears. If you are sticking with 31" tires it should be fine and probably best for highway driving.
Then give me the free Engo. 99 is last week. I wear T-shirts older than that. I am not trashing Warn. Just saying that they are vastly overpriced in comparison with the competition. But your money is yours to blow.
You're right. Having read many of your comments I highly value your opinion. But, the Engo lived to fight another day. The Warn didn't know it's limitations and died.