The braking system is essentially the same as a classic Range Rover.  It is a dual system with solid disc brakes front and rear. 

To assist with the braking a series III pedal box with brake servo unit has been fitted, this is a straight swap for the original Series IIa brake pedal box.

The servo  actuates a Series III long wheelbase dual circuit master cylinder as seen below.

I plumbed the system with copper tube throughout.