Pylon in an older boat?

Well, I started wkaeboarding this year and I love it. I really want to put a pylon in my boat but its pretty old and my dads worrying about damaging the floor with the force of pull by the pylon. We tore the boat apart two years ago and we added two stringers and replaced a lot of the floor because it was rotting. We also had to replace the engine support (where the engine is bolted to) anyways I was just wondering how much force is exerted by the pylon on the floor, and if you think I'd run the risk of doing some damage to the boat by installing a pylon. Any help is appreciated.