Rudder Upgrade
I recently bought a Hunter 34 and researched the "rudder issue". The original rudder was undersized. Hunter realized that half way through 1983, and many of the 1983's (and all 1984's and later) have the larger "performance" rudder that replaced the original. Once Hunter changed the rudder on the new boats, they offered a free upgrade to any owner that already had the smaller rudder. For this reason, most of the 34's out there have the larger rudder, even if they originally came with the smaller one. Your more likely bigger concerns about a '34 surround the compression post problems, which have been discussed extensively on this site and are in the archives. (PS: I left Wisconsin in December to buy my boat here in my new home in Florida. The sailing season is too short up there to properly enjoy your boat.)