If you added the structure in another way, yes you could but PLEASE DON'T. As much as I like to see a well thought out, and very ingenuitive mod, I HATE to see people destroy these classics. In my opinion (that is shared by many others) taking the bow out of one of those is destroying it - may as well take the thing to the scrapyard, put it in the shredder, and use the money to buy a vee hull utility boat. There are always more jons around, and they are being made everyday, so if a restore goes bad, or if a future buyer doesn't like what you did to yours, they can find another one. But, there are no more classics like that, and the ones that are in existence are a dying breed.
That one is actually in GREAT condition. I would love to get my hands on a diamond in the rough like that.