Is it possible to convert??

..... convert to coil overs ....

"Coil overs?" You don't need "coil overs"

[ame="https://www.youtube.com/watch?v=52IuuCBP8MU"]Jason Digby talks about his world's fastest Leaf Spring Mopar. - YouTube[/ame]

[ame="https://www.youtube.com/watch?v=cO3jFdKMd_s"]Worlds FASTEST Stock Suspension Mopar!! - YouTube[/ame]

If you have the money, call up Hotchkis Suspension and tell 'em what you have and buy a new set of rear springs........

or do what I did.......I junked out another Dart (A body) took my original and the junker spring packs and combined the leafs until I had a new pack stacked up with 1 more leaf than original. This was a complete guess that turned out to be 'great'. You'll need new center bolts which you can get at most decent fasteners stores, good auto parts stores, or "spring and brake" (truck shops) and even the cowtown Spokamentro has one of those.

You may or may not need new U bolts, "spring clips" both of which you can get at a good spring shop. you need to throw away those extended rear shackles and find some stockers, or at least re attach those so they are shorter, using the "short" bolt holes.

The ONLY thing extended shackles were ever good for was...........well.......nottin'