I would try to get a rustfree floor section here on FABO. Then you can get it back in style on one weekend I would guess. Just take it care above the fuel line!
X2 on the fuel line!!!!!! when my father and I replaced the floors in my 66 dart he got a little over zealous with the angle grinder and juuuuust nicked the fuel line. I about shat my drawers and he did too when i pointed it out.