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Originally Posted by John S
I thought I would share this with everyone in case you are thinking of running this setup;
I found out too late that the March power steering pump is not compatible with a Hydra-boost. It seems that the March pump has 40% less fluid capacity and is unvented which causes pressure to build up and steadily apply the brakes on its own.
Not wanting to remove the pump and install a standard Saginaw P style pump, Paul from Hydrathech gave me a few ideas on how to solve the issue.
What I ended up doing was to drill and tap a 1/2" npt hole in the filler neck of the pump and installed a 1/2" x -10 an fitting. I then installed an ARTS aluminum reservoir on the inside panel of my fender and ran a -10 braided hose to the filler neck.
Simple fix and now everything works great.
here is an image of the fitting into the pump neck;
And here is the reservoir, of course I polished it 
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How much fluid capacity is needed for the hydra-boost to work effectively?
I just had one put on my car and the brake sensitivity seems to be inconsistent. Sometimes it's will practically through you though the window, and other times it feels like manual braking.
I wonder it this is my problem as well.
Does your hydra-boost, "Hiss", at time a bit like the air brakes on a 18 wheeler?
Ty