The car had power brakes when I got it and those are the lines (I think they are original) that were on it then so they did work with the original master. If you look at the pictures, I think one of the lines would work for MC to proportioning valve, but one is way to short and looks like it would go into the top of the proportioning valve rather than the side as shown in the comparison pic of the old and new lines. So the problem I have is one line from the MC to proportioning valve and the fittings from the front brake lines and the rear brake lines are incorrect that go from the proportioning valve to the wheels. That would not be affected by what master I use.