I am planning to upgrade to 560 sl springs and Bilstien HD shocks. I just hope it's not too stiff.
I'll also be replacing the rear subframe bushings while I'm there.
If anyone has firsthand experience with a similar upgrade please chime in.
'85 380 SL (sold)
'85 Carrera Flatnose
'71 280 SL Signal Red/Cognac