Aw, C'mon all the big powerful mall crawling full size trucks are doing it!! I had a guy drive up to me in my truck a few months back. He had an 4" IFS lift kit with a 3" bodylift and 35" tires on his rig. He parked alongside my rig, and asked me how big the blocks on my rear springs were. I told him that I didn't have any. He then asked how big my bodylift was, and I told him I didn't have one. Then he asked what size tires I was running, and I told him that I have 37's. He insisted that I was running blocks when he saw my overload leaves under the 5" All Pro springs. I told him to look closely, which he did, and then apparently he was offended that my truck was more built than his, and took off! I am so glad that I never wasted my money on that stuff and did it right the first time.
