Raising the rear end

Due to the way Mopar springs are made (asymetrical with most of the strength forward of the axle and 2/3 of the length behind the axle) shackles will NOT work to raise the car, BUT will kill handling. I've run air shocks, as have many others. I've NEVER personally seen one rip the upper shock mounts out.

New springs or front hangers would be a better way to accomplish your goal.