C6 Wheel Fitment Issue

I Bought a set of factory C6 corvette wheels 18 x8.5 and 19 x10 with factory good year run flats on them. The guy I bought them from had 1 1/2" spacers to make them fit on his 04 z06. My question is will these mount on my 2002 ss in the rear with the spacers he already has. I have read somewhere that 1 1/4" spacers are needed. Any insights would be appreciated.

Go to the FAQ "stickied" at the top of the "Wheels and Tires" forum.... open the thread.... scroll down to the bottom of the page for details of the C6 wheel install. All 4th Gens are basically the same with regard to the required wheel offset and the design of the wheel wells.