Good advice above. 
Wheel question...
Race Director
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Melting Slicks
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From: North Port Fl
They won't stick out but there might be a problem. The front will be fine, but the rear might rub on the inside.
The stock wheels for a coupe and a convertable are:
fronts 17 x 8.5 with a 58mm offset
rears 18 x 9.5 with a 65mm offset
wheel offset explained
http://www.fullsizechevy.com/forums/...explained.html
The stock wheels for a coupe and a convertable are:
fronts 17 x 8.5 with a 58mm offset
rears 18 x 9.5 with a 65mm offset
wheel offset explained
http://www.fullsizechevy.com/forums/...explained.html
Melting Slicks
Joined: Mar 2005
Posts: 2,891
Likes: 4
From: North Port Fl
I'm wrong you are correct, with a wider wheel you would want less of an offset, so the rear wheels will probably be ok, but the front are also 1 inch wider and they are about the same offset as a stock wheel so there is a chance the front wheels will rub on the inside.
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Melting Slicks
Joined: Mar 2005
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From: North Port Fl
I agree the rear wheel is fine, its the front that I think might be a problem. Maybe not but it will be about a 1/2" closer to the frame than a stock wheel and tire.
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St. Jude Donor '03
The front OE Z06 wheel is 17x9.5" with a 54mm offset.
A 3mm difference here is so slight, (less than 1/8"), I wouldn't worry about it.
I base all my "correct fitment" calculations off the stock Z06 wheel dimensions, because they fit perfectly flush with the fenders and aren't tucked in so far like the C5 wheels are.
FWIW, (see my sig above), I am running 19x9.5" - 54mm and 20x10" - 52mm offset wheels. They were made to fit flush with the fenders exactly the same as the Z06 wheels do. There are no clearance issues whatsoever.
A 3mm difference here is so slight, (less than 1/8"), I wouldn't worry about it.
I base all my "correct fitment" calculations off the stock Z06 wheel dimensions, because they fit perfectly flush with the fenders and aren't tucked in so far like the C5 wheels are.
FWIW, (see my sig above), I am running 19x9.5" - 54mm and 20x10" - 52mm offset wheels. They were made to fit flush with the fenders exactly the same as the Z06 wheels do. There are no clearance issues whatsoever.
Melting Slicks
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From: North Port Fl
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Those will work just fine. Good luck with the new wheels.