You'd be amazed what well set up leaf springs can and will do, and the stock Chrysler arrangement is noted for being about the best design in the business. With the right shocks, springs, rear stabilizer bar, and possibly the addition of a panhard rod, you should be able to hang with just about anything.
I can guarrantee you, unless you are well versed in suspension design, properly setting up any kind of link rearend setup is going to be for more difficult, no matter what the springing media or who built it.
