Back after a while with a 02 Z28
Bilsteins are good shocks, but still not ideal with the higher spring rates lowering spring have. IMO, Koni SA's are your best choice with lowering springs. IMO, I'd put the Eibach springs down below any of the following lowering springs as a good choice.
Strano's, BMR, H & R, Vogtland, Hotchkis.

