What are the best springs to match with my KONIs?

[SVOPaul]

One of the great advantages of KONI adjustable shocks is that there is no specific spring for matching optimum performance. Instead you can adjust your KONIs to match your springs. Most performance springs have a higher spring rate than the vehicle's original springs. Since the shock controls the motion of the spring, increased spring rates require more rebound damping for control and that is one of the reasons why KONIs are rebound adjustable(and some are double adjustable). Using higher rate springs with OE or soft shocks will very quickly overcome and wear out the shocks. The KONI adjustment range is typically about 100%(twice as firm at the full firm setting as at the full soft setting) to allow for the proper damping of OE springs and high rate performance springs.

[SVTpower]

The FRPP "C" Springs match up pretty well. Ive had them on my past 1993 GT very and my current 86 SVO.