Replacing the floor seems easy. It can be more challenging than most would suspect. Nearly anything is possible with enough patience and time. I am currently replacing the aft half of the floor in my 1972 Ambassador
. I am doing a "shell on" technique. In my thread it shows how to "flex" the shell and get the boards out between the frame and shell. Having said that, If your whole floor needs to be replaced, I would recommend you do a "shell off" floor replacement. You are close to where I am, so If you'd like to drop by and see for yourself just send me a message.