leaf sping/caltracs
Anytime you take leafs away from a spring stack, they become very weak and tend to bend and sag faster. Multi leafs are designed to work in conjunction with each other, and should probably not be taken apart.
Taking clamps off isnt a good idea either. All mopars suffer from excessive down pressure towards the rear tires, you can see this by the amount of separation in the rear as it launches. Taking these clamps off, especially the rear ones, will worsen the problem because it will allow the leafs to separate like feathers thus giving you even more body rise.
Putting the bars on what you have already will be beneficial. The most important aspect is going to be the type of rear shock you use. Finding a good adjustable shock is key.