I hate to say it, but if you'd have read my threads before, you were warned- RC coils are JUNK.
Is the rear TB bracket by RC? If so, GET RID OF IT! They bend if you look at them funny.
My advice is to get rid of EVERYTHING RC. I've heard nothing good, and my experiences with them tell me not to expect anything but garbage.
Since you're in NY, Rock Krawler is in Green Island, NY. They will hook you up if you do cash-and-carry, and they'll help you out big time. They were great to me, and I saved a TON over their advertised prices by showing up with cash in hand
Their 3.5" kit fits my 35's NICELY, with room for monster flex. It rides and handles VERY well with Bilstein 5100's. I got ~4" of lift (after a BIT of settling) with steel bumpers and a winch up front. Check out my post on the lift- I put a TON of info in there.
Any time you increase height, your current shocks SHOULD be upgraded so they don't limit your flex. Going down the road, with a 2.5" lift shock and 4" springs, you likely won't ever see a problem. On the trails, you may blow a shock, but you WILL find them limiting your flex/travel.
I DID have to replace my front OEM driveshaft, but some people get away without doing that for a while. Above 3" with a 2-door, you WILL have to at some point. RK also got me a bit of a discount on a Tom Woods shaft. I've been very pleased so far- no extra NVH (Noise, Vibration, Harshness), and no more clicking! I'd highly recommend rear upper control arms (to adjust the rear pinion angle).
Rock Krawler's 3.5" x-factor kit moves the rear axle back ~1" (.9 for me), which actually improves the rear driveshaft angles. So far, mine is about the same as it was stock, and ZERO issues so far