It pains me to say it considering these are limited edition trucks, but, the quickest easiest way would be to drop the body on a solid 4x4 and go from there. You could put a solid front axle up under it and swap trannys, but that could nickle and dime you to death. Im not a fan of clones, but it's not really that big of a deal if the price is right. I couldn't imagine tearing my '00 HD F150 apart for that swap. Being one of less than 8200 I'm gonna hold onto it. At least pick a year that more were produced. Lol.