Here's something else you might look into. I used the rear brake calipers from a 1985 Cadillac Seville. They aren't too big and they have the mechanical parking brake function built in. My brakes are Corvette, I just used the Cadillac caliper for the e-brake. I'm capping off the hydraulic part and only using the mechanical part. The only thing you have to do to make them fit Corvette rotor is to shave a little of the friction material off each pad to make the space for the rotor. You won't need a full amount of friction pad anyway since these will not be used to stop the car. Anyway, this saves the trouble of cutting calipers and widening them.