I have the Baer Track kit 13" front and 12" rear brakes on my 81z. They are basically C4 vette brakes I was told. I can get a good deal on Wilwood master cylinders but I don't know what bore size I need. Do I need 1" or 1 1/8" or is that just preference. I want to track/auto-x this car and want the brakes to grip without killing my leg.The smaller the bore the more leg pressure it takes? What is the c4 vette master bore size? I asked Baer and they said "use a wilwood master".