Yup, that's it. The 4 small "circles" are the seals, snap ring, and washer. The bigger one is the seal for the top of the side cover housing (the cover with the four bolts that attaches to the other end of the pitman shaft). If you're near a dodge parts dealer (Autozone/Napa might have it too) pick up the needle bearing(s) for the shaft as well. Don't forget to get power steering fluid too.
Have someone turn the wheel as you look at the pitman arm. If there's a delay (a little might be okay) in the movement of the pitman arm when the steering wheel is turned, replace it.