Tire size/type ideas?

One more thing, I cant really ask how much you weigh so I'll say this, uness you are a fellow person of substantial weight, you probably don't wanna run the superstock rear springs. My dad says my car rides to rough like a 3/4 ton truck but I find my suspension firm but not harsh and I have over 100lbs. On dad. When we ride in the dart together it actually rides like a car lol!

You were pointed to Espo springs n things for new rear springs, check out mancini racing for their OEM XHD springs. +2" should set the back of your car where mine is with a softer ride.