Take a look at your Pan hard bar. Look at how it pivots. The lower you go the more it shifts the rear to one side. Cars are suppose to “track” (rear tires and front tires run in same track line) Getting the rear to track with the front is the second adjustment in a 4 wheel alignment. The first is “when possible return car to the correct riding height”. The biggest issue will be the toe in the front. Anytime you change the riding height (or anything that changes the position of the rack) the length of the tie rod is must change. This adjustment being out will damage your tires. Both adjustment will cause poor handling and cause the car to wander and pull to one side.
IMO this is the minimum that needs done to lower a car. You Z28 guys need to look at the issue with the torque arms.
Can you do it? Yes as long as you do not care about your tires or how your car handles. I am pretty sure they are going to pick someone that says they know all this and are willing to do it right. Last thing they want is someone coming in here saying their car handles like crap after the springs were installed.

 

I have air rear shock absorber.

 

Well if i get picked ill just have to suck it up and do it. Food is an afterthought when it comes to my baby

 

5th Gen 1.4"

4th Gen 1.4"

3rd Gen 1"

 

At work, can't post pix now, however: I tried lowering my 4th gen all the way around a few years back-along with putting some KYB shocks throughout. While it looked really cool, I can't say bottoming out over light bumps was fun. Speedbumps were hell (still are), and any high ridged sidewalk, crossed over, could jack up your bodywork. I'd be game to try again, if in fact there was someone that could assure of a solution to the whole bottoming out thing. As it sits now, the car is on 18" ZO6 rims, still lowered in the front, just not in the back. The stock springs went back on because I just couldn't take it anymore.

 

We have already sponsored a 5th gen. Looking for 4th and 3rd