Need help with wheels please

[Pac-man]

My friend bought a new, 08 Z06, and sent it to Lingenfelter. He gave me the stock wheels and tires, sizes 18x9.5 front, 275/35/18, and 19x12, 325/30/19. I want to put them on my 99 C5. I am currently running C5 Z06 size wheels and tires. I do not want to do mini tubs. Does anyone know if I can get away with spacers in the rear? And if so, what size spacer, where can I get them, and what would be the detriment, if any, of using spacers. Thanks everyone.

[zagger]

You won't have a problem with the fronts. As for the rear I was under the impression that anything over 315 would stick out of the fender. The spacers would be required depending on the rim offset. Since you have the tire/rim package just try one on the rear and that will tell you what you need for a spacer. Good luck and post some picks.