Odd Ball Part Needed.

Wiper pitman arm. It may be dangling from the linkage inside. The aren't all the same either. Early pivot points had bronze bushings where later have nylon ball sockets. I dont recall what year they changed.
Make sure the motor shaft etc.. is in the correct position when attaching. I saw the wipers go the wrong way and damage the paint on a hood once (AMC Hornet).