If you glass one you have to glass the whole tank or the patch will come off, however having a new tank built is the best way to go. I would clean it up and have it pressure tested and put it back in without the foam. I made some wedges for my tank that held it in place just fine. As far as the deck goes, all of the SC boats that I have looked at have the broken bond between the deck and stringer, it's no big deal. Just make sure that the stringers are still bonded to the hull well, and put that sucker back together and run it. If it ain’t broke then don't fix it.
