My master cylinder was bad which ruined my brake booster. I replaced both and I'm having trouble getting the rear master cylinder brake line in. It was very tough getting it out. The threads on the fitting really don't look flattened or cross threaded. I get one turn and it binds up quickly. I am going to try a thread file on the fitting and then carefully try to install the line. If it doen't work then I guess my only option is to replace the line. Any recommendations as to where to purchase a set? I replaced them 20 years ago and can't remember where I bought a correct set from. Thanks for everyone's help I appreciate it!