Does anyone know if the Bendix and Moraine power brake unit is interchangeable on the 1957 Oldsmobile? eg, if I currently have a Bendix unit installed, can I install a Moraine unit without modifying anything? John

 

You have to change both the booster and the master cylinder at the same time. Otherwise no other changes required. You can send you existing unit to be rebuilt then have the advantage of like new. Best bet for safety