I am not sure if you had an internal gas tank from the pictures, but if you did, this would be the time to replace the filler and vent hoses and the vent line cap. If you do not have one, this is the ideal time to add on. Also, check any wiring that ran under the floor boards for nicks and wear, especially since you had mice in it. Might be a good ideal to replace it at this time. When I had have to replace the floor on my previous boats, the foam was usually waterlogged and I would replace that as well.
I am also going to replace the floor in my Crestliner and I will do as I noted above.
Good luck with your project,
Cheers,
Bill