First question, are they C5 Z06 or C6 Z06? Originals or reproductions? The size and offset should be stamped/cast into the wheel mounting pad, so if you post up that information, that would help others help you.
Since all C5 and C6 wheels are medium to high-offset wheels, you'll need wheel adapters front and rear no matter what and probably mini-tubs in the rear like the earlier posts have said. If you have C6 Z06 wheels, a new subframe up front built for wider wheels/tires will be needed unless you're okay having the turning radius of a semi.
Tobin
KORE3
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