Barracuda spring sag in rear.

Ditto on the ESPO springs. they are cheap, come with a new pressed in front bushing and let the suspension work the way it is supposed to.

If you are taking the springs out, why not get the Mopar performance kit, take the housing to a shop and have the perches moved in 3/4 of an inch on both sides (kit comes with new perches). This gives you more clearance with no radical change. I'm still using 14 inch wheels, but it let me use 7" ralleys that I had made to mimic the stock wheel offset on the outside so all the new width is inside and the wheels look stock.