What pitman arm do I need?

I am pulling the PS off of my 71 Demon and installing a manual box out of a 73 Duster. YEP they look different. Looks like another trip to the parts house. Question is which one do I need? The 73 enters from the top of the center link and of course the 71 comes in from the bottom.What do I need to tell them at the parts counter? I know this has been encountered before by someone. I could not find a posting on it.
Author: admin