I am looking at a 1983 Hunter 34. There are a couple of things that have raised concern. First, there is a lot of crazing in the gelcoat, above the water line. From what I have read on the subject, it would appear it is caused by flexing of the hull. It does not appear to be deep cracks, but it does not look great. Secondly, I have read about the rudder on the 83 being replaced with a larger "performance" one, due to being under sized. How does one know if the rudder is the original or replacement. Thanks