Install a Hydrobooster hydraulic power brake assist unit in place of your old vacuum booster and get an immediate 100% increase in braking performance.  Not only can this unit easily replace most stock vacuum boosters but it can be installed in cars with factory manual brakes.  The only requirement is power steering.  Perfect for your Corvette, Mustang, Chevelle, Camaro, Charger or other Hotrod or muscle car project.  Fits most GM, Ford, and Mopar applications.  The unit you receive is ready to mount to the firewall for 4" square bolt patterns and custom mounting plates are available depending on your application.  All you need after you get this unit are pressure lines designed for your project car and a '77 or later GM Corvette master cylinder.  Please email me with any questions.  You will receive a Hydrobooster that is tested, modified, cleaned, painted, and ready to mount to the firewall.  I offer installation consulting, custom application mounting plate service for extra $$$, and a completely new feel to your braking.  Instant face-in-the-glass braking performance with true toe pressure and minimal pedal travel.  No warranties or returns and most orders take two full weeks to arrive at your door.  Again, please ask questions.  I need to know your specific car information as these are custom in most cases for YOU...they don't come off of a shelf ready for your car.  Good luck and happy bidding.