Brake line flaring Type?
The other three went in perfect.

So all i know is you can't get the complete ready to install hard lines from a dealer , think you can get bulk tube and the tube nut / bolt from them though , then make them.
I had to make up a front drivers brake pipe and just used my generic brake flaring tool i got from a tool store .
Might be worth going to an auto zone , advanced auto parts etc and check out flaring tools .
On brakes i think there is a universal flare angle
You might be able to get the tube and tube nuts from auto zone etc.
37 * comes to mind but don't quote me on that

Sorry i can't be of more help
I have heard some people suggest that it is not a good idea to make your own lines and potentially unsafe.
However, years ago I did. My '64 GTO had some brake lines that failed due to rubbing on the frame and retainers. I didn't know anything about it, but bought a double flaring tool and made my own lines. It worked fine. I had the car for another 8 years and no problems.
Good luck.
.Shame gm can't supply new ready to fit lines.
Maybe take that line to a good garage , they may be able to make one up and use yours as a template .








