it is do able, if you want to fabricate some mounts. that would be the main thing to worry about. frame width isn't an issue, is where the bed bolts to the frame that is. If you don't want to do any fabrication, than i would suggest not to do the swap. If it were me, i would consider it, but i've already got 3rd gen stuff modified to fit into my truck....another option would be for you to tell the guy that he has to cover having his bed mounted to your truck, flat beds are always worth more than regular beds, so it is in his best interest. However, I am with cody, i have seen the pic, and it looks weird...but definitely unique.