ced600

Just wondering if 1500 and 2500HD upper and lower control arms are interchangeable?? I have a 2004 2500Hd Crew Cab, however it is only a 2wd. I would like to turn it into an SS. The front end is wider for towing and the front wheels actually stick out a few inches past the fenders. My thoughts are to change out torsion bars and all for 1500 control arms in the hope that they are shorter. I can't seem to find specs online for both. HELP!