If your planning on running the 13" c4 rotor you will be more then fine. That's exactly what I had in my picture. They're actually able to clear a 17" Torq Thurst II wheel with the raised corvette lettering shaved off. Touring classics will also be able to sell you the brackets for this hybrid c4/c5 setup. I have used both Touring Classics and Kore3 brackets and I am pleased with both company's products.

Are you concerend with Caliper face to wheel clearance?

If so, ask Coy how thick their wheel pad is, and then measure how far your caliper is past the wheel mounting surface/rotor face. Which I believe will be right around 3/4"

guess im looking for some c4 rotors now.