Black M Code GTS at Mecum

no they did not.

Are you thinking of the 68 Hemi Dart/Barracudas? ... they used a B-body Dana and B-body 8 3/4 with large bolt pattern. That’s why those cars have odd looking rear rim to move the tire inward to make up for the wider rear end.
I'm sorry I guess I'm just still learning. Just really wanted to know if it was my old black 440 Dart.