Hydro Boost brake system

I was just going through some paperwork on my OKA and came across a good diagram of the Hydro Boost system. I followed up wi8th some research and see a huge number of vehicles from the 1970's onwards  use this application. Most common of course is the American GM and Ford PIck-up to medium truck range but all over the world they can be found.

It replaces the old vacuum and vacuum over hydraulic systems with a much more robust and foolproof operation. Everything is driven off the power steering pump which provides pressure to both steering and brakes, Apparently a failure of the pump or drive belt results in a much less extreme drop in performance than vacuum systems.
 

Interesting, is that what the OKA has or are you looking to upgrade, I recently replaced my F100 booster with a dual diagram one, after just passing brake test every year, I have gone to having the best brakes on anything I own on the F100, it has a belt driven pump as it is 7.3 diesel, and it holds enough vacuum for a couple of pumps after the engine stops, a mate has an electric vacuum pump on his F350 that works rather well also which is probably good if your motor stops for some reason. 

OKA"s all had the Hydro Boost from new. With all around discs I have not driven a light commercial with better brakes ever.