I have purchased the zero offset disc brake kit for a 1st gen Nova. When i install the caliper brackets (p/n's 31758 & 31759) that were included in kit # 6467dbk the loaded caliper will not fit over the zero offset rotor. These brackets work fine on the original 5 lug spindles but not on CPP drops. Do I need caliper brkt p/n's 31947 & 31948 for the zero offset rotors and drop spindles?

Thanks
Frank