will these wheels fit
How well? You've supplied not nearly enough "information"!!
Do you know the "offsets" of the wheels that you want to use from the C6? Do you know the "backspacing" of the whhels you want to use from the C6?
Your spacers are how thick? Do you know the offsets and the widths of the wheels you have have mounted now? If you know the advertised offset and widths of all (8) wheels you can calculate backspacing and then compare "wheel to wheel"! The math isn't difficult.








