they have both small and big bolt pattern on them. pedal pressure seems good, i haven`t driven the car since the conversion, snow here. the kit was 672 dollars from summit and the brake lines were 60 from summit. make sure you get the right kit for your car. my kit is the 10" drum spindle because my car came with a v8 wilwood also sells a kit for 9" for cars that came with a /6