I think forty year old steel lines are an accident waiting to happen. I pulled 1982 lines from my truck five years ago and they crumbled at every fitting regardless of appearance or care. When bent double, they readily snapped. They only had "surface rust". I've looked for references about the problem and I can't find the proof. I suspect the brake fluid and the water enbrittle the metal much worse than appearance suggests.
Lines $250 Cylinders $100 linings $75 Master $50 Hoses $50 One day wrenching, free.
