Rear coilsprings to soft????

[thatrogue]

I have a big block 72 c-10 with the cpp 2 inch front springs 2 1/2 spindles and cpp sway bar in the front. In the rear I have the 5 inch cpp coils and 2 inch alum blocks. All the way around I have the nitro DOESCHTECH drop shocks also from cpp. Oh and of course a notch. My problem is the rear springs seem to real soft... I have heard these cpp rear drop spring are a little soft and they seem to be... when I drive down the road a following car can clear see the rear wheels cycle up and down a few inches rapidly the front seems smooth.


What do you guys think?