They're all good!
Including my 1979.

Do not know the exact number. We went over this a few years back and came up with something over 800 just from available HINs.After 1982 there are several upgrades: better and fewer opening portlights, traveler mounted on cabin roof, and larger engines are the most often talked about. Problems remain: lots of portlight leaks(mine never did), corroding aluminum water tanks, and aluminum holding tanks that almost all disintegrated.Find the latest model possible and then get the best survey possible.