2-27 clearance
I'mm sure someone out there has mfg drawings and specs for your boat (mine's a 2-29) but one caveat:not all rigs are the same and some have been replaced/modified. If it's that critical, just hook a 50-ft tape measure to a halyard and haul it up. Add cabin top-to-waterline distance and a few inches for masthead stuff and you have it. Fred