Looky what I found...

[McGillicuddy]

Capt Chuck,
The hull is #147. Title states 1966. Motor suggests earlier.

Fr. Frank,
I definitely plan on sticking with this motor configuration.
I believe the motor is a 230 c.i., and the stern-drive is a MerCruiser 1-C. I think the block is essentially the same as the 250 c.i., just different bore and stroke, maybe - right? I'd like to learn more about horsepower boost. I've looked into the electronic ignition and found Pertronix 1163A is the marine kit for this Delco distributor. That sounds like a maintenance/reliability improvement. Probably burn fuel better, too.

Is the stern-drive interchangeable with modern drives and parts? Thanks.
-Gillie