1. Looks like the old style. Water lubed bushings and smaller exit opening would determine the early style.
2. I used a large pry bar in the u-joints up against the stringers to hold the shaft from turning.
3. From that pic, you cannot yet see the wear ring. Needs to come apart.
4. Better to check 'play' with the bowl on, thru the clean out access hole.
Dan'l