I recently finished replacing the king pins, bushings, tie rod ends, and drag link on mine. I also drained the steering gear, re-filled with new corn head grease and adjusted the worm and sector. To set the preliminary toe, I just measured from the rear of the tire and the front of the tire. To center the steering, I left the drag link disconnected, bolted a straight length of angle iron across each front wheel, measured from the rear end of the iron to the frame, measured from the front end of the iron to the frame and adjusted the toe and pivoted the wheels until the measurements were equal. I then centered the steering gear on the high spot and adjusted my new drag link to fit from the pitman arm to the steering arm. Last step was to remove the steering wheel and center it. Truck runs straight down the road with no surprises.
