[WFBowen]

As designed, these brakes are great. If intended for road use, the only suggestion would be to replace the master cyl for a later (68) dual unit. Other than that just bringing the whole system up to spec will give you all the braking you’ll need. And remember that, as produced by Porsche, “road use” included daily 100mph sprints on the then-open autobahn.
Good luck,
Bill