If you are taking all that time time do a rebuild I can only assume you will be doing it right and meticulously.
I also see you are going to be moving to ME. Please take the time to do rust prevention.
On my 90' which is going thru full floor pan replacement I have treated both pans (front/rear), interior/exterior, frame rails, crossmembers, basically evrything from the lower third of the doors(interior/exterior) to the rockerpanels,lower fenders and quarter panels, with Zero Rust. ZR is my choice for rust prevention, you may have your own and thats fine too.
Whatever you use I would coat everything that you can after rust treating with a good bedliner, Herculiner etc. and get rid of the "cancer carpet", for less that $200 you can replace it with someting that is not going to act like diaper and hold all that moisture.
I live in NH and did live in ME. The winters here raise havoc with $hitty sheet metal on our XJ's.
I would hate to see you going to all that work and expense to rebuild just to have it eaten up by the road salt and sand used here, on a happy note you'll love New England, especially NH & ME., ton's of old logging roads to go offroading on.
Good luck with your project.