So, I'm thoroughly disappointed in my 2.5 leveled front and 275/65R20 tires. I want to run 37s on an 18" or 20" wheel. What will I need to accomplish this? 6" + leveling the front of some kind? Do any kits not require cutting off the stock transfer case mounts? Is there an accepted "best kit" available. Coming from GMs in the past I know the consensus on them was Cepek for OBS and CST for NBS. Just wondered if there was an equivalent to that in the 4th gens.