Started fabrication of the original bracket idea which used a hole drilled at a 45 degree angle to allow the vertical run of the brake line through a bracket mounted on the 45 degree firewall stiffener. Tried using a step drill and then a drill bit. The results weren't great so decided a different approach was needed.
Decided on a new bracket design with slots to allow the lines to move side to side, but not forward and aft. Used a second part to secure the lines in the right and left direction. Realized I needed to make a new larger version of the second part.