It's like this:
All 67-76 108" wheelbase A bodies use the "Duster" floor.
67-69 Barracudas, 67-73 Valiants, 71-72 Demons, 70-76 Dusters, 73-76 Dart Sports. Doesn't matter if it's a 2 door or a 4 door. All the 108" wheelbase A bodies use the same floor ( yes there are some year to year differences, but they will all fit).
By the way, this is a one piece floor.
And all 111" wheelbase A bodies use the same floors.
67-76 Darts, 71-76 Scamps and 74-76 Valiants. 2 door or 4 door. If it's a 111" wheelbase, it uses the "Dart" floor.
This is a 3 piece floor