Skipshot,
The problem with those hulls occurred mid 80's. Keep in mind while looking for a boat you don't have to avoid a boat of those years. Many of those boats received upgraded replacement hulls. There might be a way to tell if they've been warrantied by looking at the VIN. # on the back of the hulls. Maybe Matt might be able to tell you how to find that info out. When looking at boats check under the shear by the front beam. If you find cracks in the gel coat that extend more than a couple of inches be careful. If they're 10 inches long run away. I had a 81 that I bought in 85 and there were some cracks 2-3 inches when I got it and after 17 years of heavy use they never got any bigger. Good boats.