I have to replace the master cylinder and have tried 3 different stores and keep getting the wrong master cylinder. The one Im getting has an invert fitting in the new master cylinder and my original master cylinder has a "flat" fitting. Ive tried to use one of the aftermarket cylinders but the lines will not seal, and yes they are going all the way in and are tight. Is there an adapter fitting I can use to convert to? Ive looked at all the local auto stores and the local hardware store. This thing is driving me nuts! Any help would be appreciated-Thanks