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I can't help on the year, the 3B is not on the list provided on this site.
I do agree it is a 16 and I have two of them. One has a 70hp Yamaha and one has a 90hp Yamaha.

70hp is plenty, the 90hp really flies. In the Chesapeake it is a pretty bouncey ride in chop and boat wakes. Very safe and stable though. Will be great for crabbing.

I would guess the DNR would be the place to start for a title.