OK my car wanders all over the place if there is a rut or uneven pavement you bet i hold on and try to keep her steady ( i looks like i am drunk when i am drinvinf in a rut invested place like the nj turnpike) .... even after a full aliment  still have not resolved this problem (to stock specs)  
The suspention was done plus the rag joint replaced (from unbalanced engineering) 
here is a list of all the stuff done...  plus new ball joints tie rod ends etc..  
SLP-Lowering Springs & BilStein Shocks, SLP-Panhard bar, 1LE Front & Rear Sway Bars, DMS-Sub Frame Connectors, DS Loop, LS1 Front brakes, SS ZR1 Rims w/ 275/40/17 Sumitomo Tires.
my 97 z/28 with the same rim and tire combo was no way near as bad has my 95 t/a so at this pont i am ready to chuck the slp springs and shock and go back to stock ......  rrrr  
so iam looking for a shop in nj that knows what they are doing with lowered cars ........ thx jim