I have a 93 marada 5.8 it was left outside behind my work for years the gastank door (part of the floor) was missing the rest of the wood rails were rotted so i cut them out and part the floor was bad so i cut the bad parts out the foam underneath was wet i cut new plywood for the floor do i leave the foam or take it out i am also redoing the electric and all new wood side panels and (lots of other things) so i will need to find new like 3/8 foam and like waterproof pleather or whats best to do here please and thank you