Not sure if the material is the same, with just a different name, but I made all my 59s brake lines, (as well as fuel lines), from a nickel/copper alloy called Ni-Cop. The tubing is available in different diameters and lengths, I found a 25 foot roll each of 3/16" and 3/8" was adequate for the fuel and brake lines, and as Gerry mentioned, much easier to make nice bends and double flares with. Having never been really satisfied with the double flares while using my regular Snap On flaring tool, I bought an inline double flaring tool, which made much cleaner double flares. It is faster, and easier to use, plus is more compact, so much nicer to use in tight confines under the car. The inline flaring tool I have is only one size (3/16"), so I used my regular multi size flare tool for the fuel lines, since it was typically the smaller brake lines that I had trouble with anyhow. In my case, since I was doing a fairly involved rebuild on my 59, (although I did not remove the body from the frame, as the floors were perfect), I chose to replace every piece of brake and fuel line, as the car was 60 years old, and a previous owner had replaced a section of the long main line, with 2 pieces of that pre flared tubing, with connectors, I imagine, due to rust or damage. But if your other lines look good, I suppose you could reuse some of them.
