I need some advice. I'm looking at buying a work truck with an 11' enclosed utility body on it. It's a 2001 or 2002 2wd Dodge cab and chassis with a 6 speed transmission. I have the truck in my sig which is a short wheelbase, but it is a 4wd. I really love the bed on the 01, but I really need 4wd. My question is would it be easier/cheaper to lengthen the frame on my truck and mount the box to it or convert the 01 to 4wd?