Master is 1 1/8" bore mainly for disc brake cars but works with many models.
Disc Brake Bleeder Master Cylinder
Applications also include many of the following:
1970-77 GM A-body Chevelle, GTO, 442, GS
1970-79 GM F-body Camaro, Firebird
1970-79 GM X-body Nova, Ventura, Omega, Apollo
1967 1968 1969 F-body Camaro / Firebird
1968-74 X-Body Nova, Ventura, Apollo, Omega
1964-67 A-Body Chevelle, El- Camino, GTO, Lemans, 442, Cutlass, Skylark, GS
1968-72 A-Body Chevelle, Malibu, El Camino, GTO, Lemans, 442, Cutlass, Skylark, GS
1970-72 Monte Carlo, 1969-72 Pontiac Grand Prix, Tempest
Square master cylinder usually seen on 70 and up cars - but works just the same.
GM A Body Chevelle, El Camino, GTO 442, Nova. Master is 1 1/8" bore for disc brake cars. All GM A-body disc brake cars came from the factory with this master. The master is square with the bleeders. This is for cars that want to do the disc brakes correct like the factory. The hold off valve is 7/16-24 purple fitting. The earlier 68-69 valve has the wrong fitting size. These are all factory correct parts.
A-body Chevelle, Malibu, El Camino, GTO, Tempest, Lemans, 442, Cutlass, Skylark, GS
Monte Carlo, Ventura, Pontiac Grand Prix, Nova
All parts are based off the factory originals and fit just like the factory originals.