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The size of the wheel looks "Ok' (other than they are 1" narrower than stock and will sit deeper into the wheel well)
The bigger issue is shape rather than size measurement. The issue with the your 'vette is that the brake caliper sticks out past the mounting surface on the brake rotor, so any wheel with staright spokes from the mounting pad with interfere.
I would speak to the store you are buying them from, see if you can get one to trial fit (no tire) first and see if you have clearance.(a lot of on line places will let you do this with "in stock" wheels, you just have to pay shipping if you need to return...but better to pay $20 shipping than being stuck with 4 wheels that dont fit!)