How to stiffen the steering up

Hey guys. I have been wondering what can be done to stiffen up the "no feel" power steering both of our Dusters. I have always disliked the light steering on Mopars.

The Coronet has really stiff power steering, no idea what has been done to it, it looks stock and i have not been able to contact any of the previous owners to ask what has been done.

Both Dusters have the large steering wheels and can be turned with your finger tip, One the Coronet, it has a smaller diameter Grant, if you try that you would have to use your whole arm, as a example.

Is there a restrictor you put in the line, or is it a different pump or pulley you put on there?