Just got back from th parts store with a .980 bore aluminum master cylinder original app was a Daytona or Caravan, looked at master for a Dakota, r u ready ? 1 3/8 bore and last a K car master has a .875 bore however it was cast iron, the others are aluminum. One other note th MC I brought home does not have the gruve for th rubber retainer and I dont belive the others I looked at did either but I think I can jump this hurdle