[Duster]

I bet it has a bunch of bump steer too. kwmech is right. drag link. I'm not sure how a 72 is set up but on a 73-87 if you don't have a drop pitman arm, or a stepped drag link, the truck will do just the opposite of yours. If your drag link is at an angle, it will cause the truck not to turn one way or the other. You can articulate a 73-87 to a point where it won't turn at all. That is why people put cross over steering on them.