Mopar Aluminum Master Cylinder Kit

That's the same master you can get for a 1987 ram, have it on my dart just need the adapter plate think I got mine from Dr. Diff
Just FYI

Piston is bored to accept manual brake push rod retaining ring.

Doctor Diff told me he bores the piston out so the factory rubber retaining ring will work with the A body etc brake pedal rod. If I remember right the Latter Dodge truck ones were not