Funny that I came across this thread. I just picked up an 03 last spring. I knew the rear leafs were actually in the shape of a W and have planning on getting it in to give it a once over. Obviously the previous owner thought he had a 3500 and decided to run her as such. Took it to a very reputable shop here in town known for custom suspension and building some serious crawlers. I was not ready for him to look it over for and then come back in and ask me if it was a chase truck!!!!!!!!
He also took the time t show me that the front torsions were cranked to the max - and I am just BARELY clearing BFG 315s. But cranking the torsions has put an ungodly amount of strain on the front CVs as well as the CV coming off my transfer case (which just grenaded in a miraculous fashion).
So if you are looking at squeezing some real tires under the rig - I would suggest do it right - a basig 5" RCX or Zone lift is where I am planning on going - gives you the height but also drops that front diff to angle out the axle shafts. Not to mention cranking the torsions makes it ride stiff as all get out.
Truly all IMO - but trust me - the wear and tear aint worth it.