Floors

I believe the frame rails would be the same for all 66 darts and very well may be the same as 64 and 65 darts. the difference in the 4 1966 models would be the length of the floor pan .all models have different wheel bases. the difference between 66 and different model years like 64 and 65 is the strengthening ribs in the pan itself. I would post pictures of my 66 sedan but the front floors are rusted beyond recognition.