7" Dual Zinc Power Brake Booster + 1-1/8" Master Cylinder Disc Disc Valve Kit

This is the best deal you'll find on a quality setup like this. The booster mounts with a 4-bolt pattern. The 4 bolts are in a perfect square and are 3 3/8" apart (center to center). This master cylinder is the Bail Top Style & has a 1 1/8" Bore.