Agree with Jerry. You don't need 3.5" to get 35s under your JK. My 2014 has a 2.5" lift with 35s and I didn't have to deal with adjustable control arms, trackbars, etc.
I drive light trails and overland a bit, sometimes tow a trailer and the 35s with the 3.73 gears are everything I need for those trips. If I were to begin towing heavier or start doing more serious off-road, I'd get the rear end re-geared accordingly and consider upgrading the lift and everything that goes with it.
Oh yeah- this is a 2.5" lift with 35s (March 2021 pic- I've since removed the Sahara and Wrangler decals from behind the front fenders).
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