Plan:
1. Head dunk to check for shaft clearance from prop to strut
2. Remove a single coupling pinch bolt to check for dimple.
3. If sufficient clearance and no dimple, remove PSS set screws & ensure I can move the ring on the prop shaft
5. Remove second pinch bolt and unbolt coupling from transmission. Push the shaft aft a few inches carefully w/ pry bar if necessary (minding the PSS coupling & not marring the mating surfaces). Remove coupling from shaft, clean & light oil on everything, re-assemble. The coupling *should* slide right on and bottom out if everything's clean and de-burred.
6. Carefully torque (new, grade 8) pinch bolts, alternating.
7. Draw the coupling flange to the transmission flange with oversize bolts and/or pry bars operating on the back face of the shaft coupling.
I did many of these steps when replacing the drivesaver (at anchor off Catalina) last year by myself with minimal tools so I'm pretty confident I can move the shaft fore and aft. I'm more worried about the coupling being seized to the shaft - there's some rust visible in the keyway in the photo.