[ModMustang97GT]

You won't end up with much of a clearance issue from the ground really. You will have issues with K-Member clearance. Most Turbo kits require you to have a tubular K member, and very few of those support springs at all. They usually require coil overs. That is why the HP Kit and the Helion kit come with K-member and coil over kits.

 

[ModMustang97GT]

If you get coil overs you don't keep your springs. the Coil overs are the springs. if you are wondering about the rear, yes you can. You can keep the lowering springs and just get coil over springs that work with them.

If you do get a tubular K member, there are some that allow you to use your normal style springs. Most don't have spring perches, and they take tons of space on the K-member that they are trying to save. So most do not keep them.