An 02 2500/3500 cab should fit since it was still the 2nd gen design, so the cab should fit. Take some measurements of the body mounts. In 02, only the 1500 started the 3rd gen trucks.
Keep it Mopar, buy Mopar Parts.
I am completely disgusted every time I think about having to take a distributor cap off of one of these trucks -Screamintrashcan