Scooby will probably know, but I would beleive a 220 lb 17' boat is not 104 either. They obviously had some identified market in mind with the boat.
Depends on all the factors what the boat rates. You need to have the foll set to work out if it rates 104 or not.
I've no idea what the 104 constraints are on width / length. You could get an A class to rate 104 if you added enough lead, but would it fit the F104 rules, no idea.
