Jeffreys Dart Needs to get that *** up!

New springs are the way to go. Mopar's upper shock mounts aren't designed to carry much weight. Espo will get you what you need. http://www.springsnthings.com/

I used ESPO and they were a joy to work with, fairly priced, and quick ship. I went +1" over stock and gave it a little rake and an even stance.