Ground Control seems to be quite reputable in their coilover sleeves springs to be used wth after market shocks. so im presuming their springs shudnt b too bad.

if u can find softer spring rates, it might b as good, if not better than the common Kings and kmac.

having said that, it is still a fact that any spring rates higher than stock spring rates is not recommended to be used wth stock shocks. but dont we all know that already.