c/k brake issue
I used a wrench just like the posted pic. I've goofed up like that before and used a standard open end wrench and paid the price on a nut on the fuel line into the fuel pump so I went and got a set of those wrenches. I've heard them called line wrenches, in addition to flare nut wrenches, since they will fit over the attached line of some sort.
I should mention the right rear cylinder has this milky fluid inside the ends of the cylinder. But it's all coming out once I can get the damm line removed.
Thanks GMC66 for reminding me about the line available at napa or other places. I also just remembered I have another 80s rear end in the back that happens to have the brake lines still attached and that line is probably exactly the same.