I used a /6 cable from a 73 Dart we scrapped on my 65.It has M1 and Dominator.Had to rework the pedal end as they are different and as Fred said I trimmed the outer shell a bit.All you have to do is cut a bit off where the cable itself pulls over the part thats in the clamp.It dosent caome apart.Then after its trimmed I just cut that piece off with some good diag pliers.Kind of hard to explain but easy to do.
Rocky