The She 31 is a
classic to die for! Sparkman & Stephens design, superbly built by South Hants Engineering in the UK.
As your pix show she has a keel-stepped mast, which can be tricky to set up properly - you have to apply pre-bend, and if you don't know about
rigging, hire a proper rigger to do it - not the bloke you met last night in the boat club.
I'd say the mast hasn't been set up properly. From memory, she should have an inner forestay too.
I had a She 27, which had a different underwater profile and was also only 25ft - the US measure boats differently to Europeans it seems. She was a stunning little sailing boat with Rod Stephen's 'lake' rig - taller mast and tweaks.
Won are fair amount of silverware and weathered the Fastnet blow in 79, but needed something bigger.
Don't pass on this - good one's are hens teeth but make sure you get a full
survey. And pro rigger!