wanted to replace my OEM mustang master cylinder with a wilwood one, the all aluminum one part # 260-8555 but was trying to figure out what size bore I sould use, have mustang calipers front and rear and no power brake, read that a 7/8 bore would be easy but would not move the vol of fluid for discs. so was looking a 1". If any ideas what would be the right size they come in 7/8" , 1" , 1 1/8". Just know that the larger the bore makes it hard at the pedal, so would 7/8" be big enought or 1"