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The camber will wear the inside edges. The rear toe should have be the same - one side is toed in and the other is toed out. You also have lots of front camber and almost no rear camber which isn't a great combination. With 1.5* front camber you should match it with something like 1* rear camber.
You should have just taken the springs right out. You're riding the bump stops anyways and it won't handle that well being so low. Wait until you hit a decent bump while cornering and it upsets the whole car.
Also, didn't that put a lot of rake into the car? Trying to make it look like a muscle car with shackle extensions?
that is a horrible alignment. you toe in the rear and out the front staying near zero. you can go zero toe in front if you want the best tire wear but the car will turn in quicker with a minor amount of toe out up front. -.02 is pretty nice.
camber wise, there's no reason to go above stock z06 spec on a street car. you're just increasing tire wear
that said toe has more of an impact on wear than camber.
A washer or two behind the front uppers would reduce the camber, fixing the issue. As you mentioned taking the car to the drag strip is your preferred enjoyment, yes, zero camber in the back will get the whole surface of the tire on the ground for best traction.