I have this setup on my Camaro. So far so good. I never had enough vacuum for the booster so I tried a pump. The noise was incredible and it barely helped. Now I stop on a dime.
If my engine dies (and those things happen) I have 20 pumps before I run out of boost. After that it just works like a manual. Engine dies with a Hydroboost or a vac booster and you're standing on a brick.
We just installed one on a pro-street '68 Camaro. We didn't want to put a powersteering pump on it, and there's no room for a vac booster. I'll keep ya posted!