Oldmopar-having done my own 1 ton axle a few yrs back, the process was to "remove the old pins" (sometimes easier said than done) and then with a set of new pins in hand fit them into the axle eyes to make sure that they fit snugly and done wobble or move in the eyes. If thats how they fit, your good to go-if not the eyes need to be trued up and oversized pins used. If they do fit snugly you'll need to have the new bushings that come with the pins pressed into the spindles, and then have them reamed to fit the new pins. The size reamer will depend on the difference between the OD of the new kingping, and the ID of the new bushings. What I did was to fit my pins to the axles, and then took the spindles to a machineshop to have the bushings pressed and fitted to the pins. If I remember correctly the price of the parts was about $50, and the machine work about $25, but its been awhile. Mike