[hiway]

From what I've been around the frame can stay the same width. A lot of trucks get the frame boxed in the hanger/shackle area and then remove the spring/hanger/shacker assemblies from the outside of one side to the inside of the other huh? This keeps the ride/payload the same and you can do the usual C notch if you want it lower. Just add ladder bars and go racing. Double the inner fenders.