Guys, I just bought a set of 4 C6 ZO6 wheels that measure 17X9.5 and have a 54mm backspacing. I have read through the wheel forums and know that the stock wheel had a backspacing of 41mm on the front and 13 on the rear. Can anyone tell me what size spacers I will need to get the new wheels where the stocks wheels were? Is it as simple as 54mm (new backspacing) minus 41mm (stock backspacing) = 13 mm (spacer size) for the front and 54mm(new backspacing) minus 13mm(stock backspacing) = 41mm (spacer size) for the rear? Your input is appreciated.