A spring kit will screw with the camber on the front of the car. If you don't want to donate the body to a 4x4 frame it is going to take some extreme fabrication to get it lived up 3 inches and keep geometry anywhere close to correct. The front end is a strut and A arm which means any bit of lift or much lowering throws the camber way off. The unibody makes for an impossible body lift and then the rear end is another headache. You would have to redesign or at least lengthin the track bar the trailing arms would have to be lengthened then you would have to re-inforce the body so the rear end wouldn't tear awawy from the body from the extra angle and force applied to the car. I'm a third gen camaro guy and Id rather see that thing repaired or at least scraped for the good parts. It really bothers me when I see people do those things to these cars. Hit or not why rape the poor car and make it do something it wasn't intended? Either way, the choice is yours just get ready to re-design the wheel while you do it. G'luck my man.
~Brian