Do you access to a good flaring tool? If not consider something like this,https://www.eastwood.com/eastwood-pro-brake-tubing-flaring-tool-with-45-and-37-degree-die-set.html
It's the best flaring tool I've ever used and if you don't think you'll ever use it again you can sell it on Craigs and get a big chunk of your money back. The one I bought has done complete brake lines on four Z's now and still shows no wear.