I haven't looked into using a electrical pump yet, I guess it would be an option, I was hoping not to have to.

Im not wanting to take the vacuum system away from the brakes, its more so that the car I'm looking to transplant into does not use a booster. I'm just wondering how to deal with only needing a small bit of vacuum that the pump produces. I don't know or understand the principals behind the booster in conventional.. if the diaphragm fills and then bleeds? or if the pump reaches a certain vacuum and holds it stead (at whatever vacuum its designed for)

I just don't want to suck anything into the pump