Call and make SURE those ate the XHD springs, the "340 springs". That should do it. If I were you, I would make a thread asking to see the XHD springs on Darts to see if that's what you want. I am sure plenty of these guys have them.
Before you spend anything though, I would double and triple check the car to make sure nothing's wrong. Measure the front segment and inspect everything real close. Last thing you wanna do is spend unnecessary money.