Leaky plug on master cylinder. Replace or repair?

Distribution block and possibly lines from later (67-76) car makes cloning dual res setup pretty simple, especially when running front discs. On a drum brake car it doesn't need to be any more complicated than a brass plug in the distribution block port to the rear brakes and extending the rear brake line to the front reservoir on the master cylinder.
Oil Filter Service in Portland can make up and/or supply virtually anything you would need including braided stainless flex lines to replace the stock rubber if you wanted to go that far. Great guys to deal with too.