[65Bowrider]

Measurement from keel to transom top in center is 30" by plumb line, and 25" in middle of step to transom top for twin mounts. The transom is angled, so could not use measurement directly on transom line, but I can measure that if you'd like.

The 1.5" CoosaBoard weighs about 1/2 of what 2-3/4 plywood & it should last a lot longer...even though this boat is already 45 years old!