I would go with the original system. Everything has a place to go with no adapting. The vac boosters work extremely well, once rebuilt and right. In an emergency, the booster will slow you down much more quickly than without. I have 2 heavy 50s truck with vacuum boost and they work exceptionally well. You never have that feeling that you're not going to be able to stop in time. They both have reserve vacuum tanks (original) to help in an engine loss situation.
