Path,
While employed in Detroit, I only worked 2 years in foundation brakes. But I have done a lot else before I went back to the water only to get wiped out by the depression.
You have neglected to say what you plan to put disk brakes on and if they are a new addition or a replacement for existing drum brakes. Either way, if this is complete kit and all you have to do in bolt on parts and bend lines, do it your self. You will ruin at least one piece of line, so don't be stupid, just get and bend another.
The reason for loop in older vehicles was to facilitate assembly. It makes it easier to get the lines lined up right in the connections. In modern times and with modern design systems, this is no longer required. You may see a piece of line with a wrap. That looks like a spring on the line. That is because it was discovered that the line as routed had a natural frequency that could cause it to fatigue and fail, so they added that to change it.
Matt