Aaaahhhh! Yes that makes more sense now.
On my 66’ I had to use the drops from a 67-76 and trim to make fit. Since both sides are the same…. Nobody notices the difference. At that time nobody made a drop for the 66’
You Barracuda guys are lucky. My 66 Dart drops were completely different than the 67 and newer ones. I even have a pair from the 61 and 2 cars and no dice.