Corvette type master cylinder comes in 1" or 1-1/8" bore.  Recommend the 1" bore on 7" and 8" boosters use the 1-1/8" bore on the dual 9" booster.  This is a disc/disc master cylinder requires a 10 pound residual valve if you have a disc/drum application.

7" Dual Diaphragm 76.93 square inches.

8" Dual Diaphragm 100.48 square inches.

9" Dual Diaphragm 127.17 square inches.

1955-58 Chevrolet Passenger Car Mounting brackets

1959-64 Chevrolet Passenger Car Mounting brackets

1967-72 Chevrolet Passenger Car Mounting brackets

Choose from any combination of booster, brackets and master cylinder on this page.  Allows you the flexibility for clearance of your valve covers and other accessories that might be in the way of your custom installation.  This package limited to items shown on this page.  Yes, can order the stainless or the 67-72 GM correct booster, but it is not offered in a "package" deal.  There are so many combinations that we couldn't show them all.1955-58 Chevrolet Passenger Car Mounting brackets

Parts: Master cylinder, power booster, mounting brackets, 4" extension rod, clevis and pin