Nope. 66 has some "one year only" pieces like most years but the chassis and floor pans are universal between 63 and 66. Many of the body patch panels are the same for those years in the Dart line. Valiant is different.
not that I want an argument with you Mike, but the strengthening ribs in the 66 floor pan are different than the ribs in the repops. you can see this in Roy's picture and he has one solid side that if he took a picture of it you could really compare and tell. mine are totally rusted and I destroyed just enough of them where I would not be able to show you the difference. I believe the 63-65 are like the repops.
I have also talked to guys that used a 67-69 full repop pan to replace their rusted 66 pan. those conversations with pictures of their work is posted in the 66 dart owners thread.
