Alright I did the math for you, your new calipers measure at 3.99sqi vs the stock c3 calipers at 2.76sqi, so your most reactive pedal would be a 15/16.
Which means you might need one of these too, which I just so happen to have.
http://www.jegs.com/i/Wilwood/950/26...gwixoCNlHw_wcB