We extend to you a cordial "WELCOME ABOARD !" Come on in, make yourself at home, we are a friendly group of enthusiasts, and we also appreciate the classic Chris Craft Roamer, Corsair, and Lancer boats too , as they are all on the same family tree and share much in common !
Our boat, FDA350001H, also has the center pole support. I have pulled this out when pulling engines and it is supporting weight. To get it out or in I have either used a piston jack or someone big and tall enough to push up. The jack works best. It does sag a little bit even as solid as it is. Maybe it is just because it is hull number one and they figured some things out later. I would also suggest you look at the beam below the doors at the step. Mine has been repaired at one time from water getting in and rotting the beam. I've avoided looking too deep.
On the inside of our cockpit there is an aluminum trim piece about a foot down and under that are screws. The step into the salon also has screws. My assumption is that the removal of these would allow the "tub" to come out in one piece exposing the gas and water tanks. If later models don't have this or it does not come out I could only imagine cutting would be needed.
As far as removing the bridge. Blaspheme! Best place on the whole boat.