I did what MJ mentioned. I assumed I was buying the hull and figured the period that the Sea Drive stayed alive was gravy. Like I said, it was still running when i had it removed, may she rest in peace.
Mulv, I had no flappers on my Sea Drive. It was rigged just like any other outboard on a bracket.
One thing I will say though is that the Sea Drive was much dryer as it was mounted so much closer to the boat. My Johnson on the 30" Armstrong definately gets dunked when coming off plane or when drifting stern-to. Hasn't been a problem though as "dunked" so far means just to the bottom of the cowling.
Frankly, after having a bracket and a Sea Drive, I don't know why they stopped the Sea Drive mount as the boat handles better with the Sea Drive, the motor is less subject to dunking and you pay less for a slip because the boat is shorter (less set back w/the Sea Drive). If I could choose between the two set ups, I'd take the Sea Drive (not the motor, just the configuration).