If this opens it is completely incorrect. This is the Seafari temporarily on a Owens and Sons custom built to secure the sponsons of a 15 Whaler...
If you can get the inside opening between inside of bunks between 54 and 55 inches you will be set for life. It is the measurement between outer and middle two flatter surfaces of your variable deadrise hull. Cannot recall correct nautical term.
Hope this helps.?!
Part II