Stink, you should start a resto thread so you can have all your work in your own thread.
I am looking forward to seeing another Clipper come back to life, that's for sure.
The 78A should be a good fit for the Clipper. Yes that's a short shaft transom. The original wood was something like 5.75" wide boards, that's why I think you are seeing bunch of holes. The boards went pretty far across, the boat was made for two motors if wanted.