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Increasing negative camber is really easy. Although for street driving I wouldn't recommend it! As you increase the negative camber , you move your contact patch towards the inside portion of the tires. This is a benifit to offset high cornering loads during AutoX or Lapping with sticky tires. Too much negative camber on the street will cause the front to "tramline" or pull to one side or the other on uneven pavement. It also increases the stopping distance because the front tires will no longer be as flat to the ground. On the rear it will reduce traction and increase tire wear on the inside portion of the tires. IMHO, the stock camber is the most negative you would want for street use.
Having said all that... here is what I do... paint a stripe across the eccentric washers on the adjustment bolts before you loosen them off , then you can easily return your camber to the original settings after you make adjustments. Be sure to check/adjust your toe as you make changes.
Changing the camber/caster on the front of the Z06 is not terribly difficult. But, you do need an alignment rack to make sure you set it where you want.
I had my car aligned to more of a track set-up and it does make a difference. On the track it took about 3% off my lap times and gives me much more even wear on my Hoosier road race tires.
However, if you only plan to drive your car on the street, don't change the settings. It will only make the car harder to drive "normal" and may increase tire wear to an unacceptable level.