[Steeveedee]

How do the current brakes work? Can they haul you down from speed in a respectable distance, without standing on the pedal? Hydraboost has been available for a long time. Maybe you want to do that? Someone will chime in eventually with a minimum vacuum requirement for whatever your setup will be. My truck is bone stock, and I'm not really looking to go too wild with it, since I tow a travel trailer and HP takes away low end torque...unless the engine is big enough. I already only get 7 MPG towing; I'm not looking to reduce that!