I didn't measure how much, but "a lot" seems about right! I'm going to put the factory wheels back on for now so I can drive it around at least. I bought a polishing kit from Eastwood that should be in soon, so I can at least polish the factory parts while I figure out what I'm doing with the brakes. I've been looking through Wilwood, but can't figure where they sell just a low profile caliper that will fit my factory parts and clear the wheels.