Future proofing the build a little bit, I've installed a Wilwood proportioning valve between the master cylinder and the rear brakes. This will include a remote adjustment knob somewhere on the dashboard or center console.
In the process of installation I replaced the whole front-to-rear line which I'd completely mangled. Made a small notch in a body panel for brake line clearance. Installed a 6" strip of clear door edge trim to keep from abrading the remote reservoir supply line to the master cylinder's rear circuit.