Cardinal Joe & Adam,
If you have any interest in the rudder configuration, I may be able to shed some light on the topic. I own this boat, 1979 hull #2. As far as I can tell the spade rudder was done by the first owner on the Eastern Shore of Maryland. The boat hailed from the Northern Peninsula, Michigan and then returned to Maryland. The boat is now in New England. The last owner added a shaft log and an electric power plant. I hope to learn more through Halsey Herreshoff and some other folks that might be in the know. As I learn more I'll keep posting. The boat is now named ARUNDEL and is moored near #8, RASCAL.....to be continued