I just put an 04 frame under my 00 sport. Jerry has told you right. The steering box is different but I found it easier to cut the locating notch off of the top of my steering box and relocate the front bolt hole. Buying the new model steering box was going to require the new model lines and pump also. You will also need the transfer case skid and bolts to go with the new frame. The old model isn't wide enough and the bolts are too big. Otherwise everything is the same.