Indeed. the alignment "thingy." I am not sure if the wing vents are the same or not. Anyway, stripped down to the core, the same. I used a 65 Valiant 2dr HT door on my 65 Dart. Lined right up. There is a difference in the door locks, however, with the 66 Door having a different door lock opening than the 65. Best. sgrip65
