Well, here's iteration number two for the left side brake line. This line is somewhat lower than the first iteration and fits well under the fuel valve mounting plate.

Since both the fuel and lines are going to have a union in between the two support brackets, I need to make sure they don't interfere with each other. Here's how the the routing of the fuel and brake lines will be. Note that the one fuel line is temporarily tipped up...it's correct position is in line with it's partner. The important thing to note here is the spacing between the two snap bushings. They have probably about 1/8 inch between their flanges.

To see what would happen if both the fuel and brake unions were next to each other, I setup this test. Note how far the snap bushings have to be even though the unions are at minimum distance? Clearly, I'm going to have to either stagger the unions or but some bends in the brake line to allow more clearance between the unions.