Call the sailmakers'.
Craig, contact any reputable sailmaker who can provide a copy of the sailmaker's drawing to the insurance company. Brad Linthicum in Somerdale NJ (he is on the Web too) has an original '70s blueprint of the H-25 rigging that my dad personally gave him (it even has the original hull graphic drawn on it, which I am applying to my own 25).The friendly neighborhood sailmaker is always a wealth of good information. I'll lay good money you'll get faster and friendlier service out of him than out of a Hunter Marine which is unfortunately loathe to provide much info about Gen-1 boats.FYI--Spar/sail dimensions of Hunter 25 ('73-'78-ish):I (jib hoist from deck) = 30'0"J (foretriangle foot) = 10'6"P (mainsail hoist) = 24'10"E (mainsail foot) = 8'0 (boom is actually about 9'4")The sailmakers typically have rigging wire lengths as well. These are hard to calculate exactly at the initial design phase because of variable fitting lengths, possibly-unknown attachment points at the spar and chainplates, etc. Once a prototype boat is rigged that info is usually lodged with the rigger/sailmaker who did the work. I have not seen any rigging-wire dimensions in my dad's archives for this boat (as yet).Hope that can help some.JC 2