Need help steering box? Car out of commission

Have you tried to adjust the "worm gear"?
I have adjusted a few boxes on other makes, I beleive mopar would be the same. With the bolt on the top. Loosen the nut and turn the center bolt in. You usually can take out most of the play. If not check the bolt for wear and replace if necessary.

Of course these adjustments are good only if your box is mounted securely.