pitman arm question

I have a power steering box from a 1975 4dr dart, and am trying to put power steering into my 1965 valiant 100, the pitman arm from the dart wont work in the valiant, and the pitman arm from the valiant is too small for the taper. i was wondering if someone could tell me if a pitman arm off of a 1974 valiant would work? thanks for the help!