Why would you want a sea drive when you don't have sails? The main feature of a sea drive was reduced drag when on sail.
Sea Drive - sort of a bracket mount.
Sail Drive - thru hull mounted and business end.
Whoops, I've got to read more carefully!:facepalm:
rolmops - From what I understand, a Sea Drive is like a WLOD: old, obsolete and difficult to find parts. You may feel more overwhelmed trying to find parts for a Sea Drive. Or even a good one to start with.