stiffer front suspension???

I have a 5/7 drop on my 99 Yukon. I believe w/ 2' spindles and 3" springs...my question is there a to make the front a little stiffer? It has Beltech drop shocks on it now. Does anyone know if any one makes stiffer springs or shocks for the front? I dont want to raise it any either. or does anyone even make a coilover for front? Wife drives occasionally...so bags are no option.

No body can help with this?