I've made a bit more progress. The seat boxes front and back are out. There was no wood holding this floor together. More like wet particle board. I really wonder if Bayliner glassed both sides of the wood. Based on what I'm seeing, I doubt it.

Take a close look and you'll see somthing the factory never installed. Someone in the past knew the floor was rotting and rather than repair it, they installed a sub-frame to prop up the rotting wood.