Brake switches are the same for most mopars through the 80s. I bought two complete systems from pick & pull from 87 vintage fifth avenue car and a dodge truck. Both brake switches will work. Just getting under there to change it is a royal pain.
Edit: When I said brake switches are the same, I meant that cruise control brake switches through the 80s will all work from most cars. They are not exactly the same, but if you have the bracket that goes with the switch, they are interchangeable.
