Re: Symmetric Rudder damage and surprise hardware!
The bolts are original and joined the rudder halves. Before removing them I would recommend talking to Gene Adams at Port Gardner Sailboats. Gene was a San Juan dealer and worked very closely with the Clarks and was a consultant to San Juan MFG when they bought the Clarks out. I believe he still builds rudders for some of the boats.
I discovered water in my rudder 5 yrs ago and figure it was getting in at the top, past the rudder post. I sealed that and it's been dry since. Of course, my boat's in SoCal and has never frozen.