:rofl: You might ought to ease back to the top and read the thread title to lower your blood pressure a little. She isn't building brakes. She wants to install a hydraulic CLUTCH master cylinder. She can't run right down to the local Dodge dealer and get a clutch master cylinder for a 63 Dart. If the part she needs to make the hydraulic clutch release work happens to have been designed for a Ford, why does it matter as long as it works?