Need help with master cylinder

I think Divenut has the right one. For some reason all the parts sources have incomplete listings for A-body brakes from 67-72. I think Chrysler superseded the part numbers at some point and didn't get the info out to the vendors. At any rate, it can be difficult to find correct listings for MCs, rear drums, hoses, and a lot of small parts. I have found that sometimes the 1972 Dodge listings are more reliable than earlier years. The problem is, sometimes this is a different part than a late 60s car, although usually it will swap in.