Floors

I may be wrong, but as far as I know the 64 to 66 floor pans, sheetmetal wise, are all the same. The reinforcements underneath the floor like in my 66 are different in the 64 65 which are almost non-existent.
The wagon floor, 4 door floor, and the 2 door floor are all the same. Dodge Darts are different though in the back as the seating area is larger and the floor is stretched out more, except in wagons.