I have an 84 z-28 that I drive daily over rough roads. (In Flint, Michigan, almost all of the roads are rough!) After doing lots of research on the message boards, I decided to buy KYB GR2 struts and KYB gas-adjust shocks for my z-28. I am not sure of the springs that I should get to go with them. I have read that the stock iroc springs, specifically BZW for the front and NNN for the rear are good. However, I have also read that the stock spring IMO is better when paired with the KYB shocks and struts. I don't race the car, I am just looking for a decent ride with good handling.

 

I believe the KYB's were valved to be used with stock rate springs.

I am using KYB's with Jamex springs and am satisfied with the ride and handling.

 

Thanks Tom, Do your Jamex springs lower the car? (I want to keep the stock height)

 

I've got those shocks/struts with an Eibach ProKit. I'm sure you know these lower the car about an inch, but it made it look so much better! The ride is taunt, but not harsh. I'm very happy with this combination.