Im convinced there is so much bullshit with these companies Right stuff is a joke
A few photos for what it's worth in helping you solve your problems. I have the same 4 wheel disc brake kit on my Dart, but did not purchase brake lines from them. I made my own line from the proportioning valve to the rear of the car (I chose not to use their proportioning valve, bought a factory style disc brake p-valve) and have factory style rubber lines on the rear. I either made or bought the tabs welded on the rear axle housing to secure the lines. Engine compartment lines were from in-line tube. I did ditch the master cylinder for an aluminum one from Doctor Diff as I could not get it to stop leaking around the cap. E- brake lines are a pain as they sent equal length lines that were not useable as the line runs down the drivers side, so I had to source the longer line and had to split the mounting tab and on the body and relocate it to get equal line tension. A lot of work and trial and error was needed to get it right, but the cars brakes are just right not over powered and not under powered.
A few photos for what it's worth in helping you solve your problems. I have the same 4 wheel disc brake kit on my Dart, but did not purchase brake lines from them. I made my own line from the proportioning valve to the rear of the car (I chose not to use their proportioning valve, bought a factory style disc brake p-valve) and have factory style rubber lines on the rear. I either made or bought the tabs welded on the rear axle housing to secure the lines. Engine compartment lines were from in-line tube. I did ditch the master cylinder for an aluminum one from Doctor Diff as I could not get it to stop leaking around the cap. E- brake lines are a pain as they sent equal length lines that were not useable as the line runs down the drivers side, so I had to source the longer line and had to split the mounting tab and on the body and relocate it to get equal line tension. A lot of work and trial and error was needed to get it right, but the cars brakes are just right not over powered and not under powered.