DAVECS2, I run RPMs above 2500 constantly (37's w5.13s and a 6spd) My cruise rpm at 75 is near 2600 and I haven't had a single issue with this jeep.
I did have both intake cams on a mostly stock JK replaced at 40k miles.
Mine JT only runs about 200* water temp until I'm stuck in traffic for...
Ok, so this isn't a inward bent control arms will fix it issue.
The wheels you like are the stock Willys wheels. A 1.25" wheel spacer will fix all your issues. Factory wheels can accommodate a smaller spacer, there are lug pockets in the wheel mounting surface for them.
Do you have adjustable rear control arms too?
That thrust angle needs addressed once you find what is loose up front.
If you can't get the tires dynamically balanced, they will cause DW. I've seen a couple with 80+ pounds of road force. That force will cause issues on a solid axle rig.
If...
I couldn't find any play with a pry bar, but when I pulled them apart to replace with Metal Cloak Baller joints, they were floppy with almost no resistance to them.
Also, check the 4 bolts that hold your steering box on. Mine were loose from the factory.
Just curious, does the amp you used have an RCA for sub frequencies?
I keep hoping someone will make an easy button to amplify all the cabin speakers and give sub RCAs to keep it super simple.
Rears are typically longer, but go on Clayton's website and look at their recommendations for the fox 2.0s for their 2.5" lift. That should get you a pretty close starting point. If those fronts are the same length (26.5") look at their recommendation for their 3.5" kit. You may have to add...
Currently running Clayton 3.5" rear springs, but I'm totally open to changing whatever needs to be changed.
Long term plans were to move to either king or fox 2.5s