McHale, the boat is far too narrow. You need to add at least two inches to the beam, maybe more. It's almost there, but with a little more effort, you can make it the way I have seen other models you have made.
You can see even from this small picture, it was much wider. There were 4 boats used in the series and one made as a prop on shore that in fact was not a real boat and was very narrow. The second picture shows you that this was a big boat. It was 38' 6" long. She had a 10' foot beam. The first pic is of the S.S. Minnow used in the 2nd season I believe.