Ok picked up a 2nd gen 3500 dually for a good price. It has a flat bed on it. I want to turn it into my offroad toy. I have a set of 37 in tires and wheels to put on. Here's where i need help, what problems will I run into lifting the rear axle and putting the single rear on. I was told the axle maybe longer, but that is good cause the flat bed is wide a hell(will scrape at some point). I was also thinking of pulling a spring out of the leaf pack, as I dont need to carry a huge load.