This is a new Black Powder Coated 8" Dual Power Brake Booster, Black Cast Iron Master Cylinder, and Black Proportioning Valve with Mounting Bracket and Pedal Rod Extension Kit for 1957-72 Full Size Ford Cars and Trucks with Disc Brakes in Front and Drum Brakes in Rear.  Part # BCK-148 SWAP MC 3511BLK + PV2BLK BOTTOM KIT

The black powder coated 8" dual power brake booster, master cylinder, proportioning valve and bracket fit a wide range of Ford Cars & Trucks made from 1957-72. 

Kit Includes:

  • Black 8" Dual Diaphragm Power Brake Booster
  • Black Cast Iron "Corvette" Style Master Cylinder with Bail Top and 1" Bore
  • Black Disc / Drum Proportioning Valve with Bottom Mount Bracket
  • Heavy Duty Black Powder Coated Firewall Mounting Brackets with 3-3/8" Square GM Booster Bolt Pattern
  • Truck Booster Linkage Rod (3/8-24 Thread) w/ Grease Fitting
  • Hard Lines to connect Proportioning Valve to Master Cylinder

In some cases, you won't need all of the components that are supplied, you may only need the brackets without the linkage & use the pedal rod extension provided.

Master Cylinder features:
  • Black Cast Iron "Corvette" Style Bail Top
  • 9/16" and 1/2" Ports on both sides with plugs for ports that you don't use.
  • 1" Bore

The Proportioning Valve is also called a combination valve, as it performs all of the necessary valving functions with a disc brake conversion. These functions include the following:

  • Proportioning:

As more force is applied to the brakes and the car begins to lean forward, less braking force is needed in the rear. This valve decreases the pressure to the rear, preventing lock up.

  • Metering:

Metering is used in the front disk brake portion in the disc/drum system to delay application of the front discs allowing the slower reacting drum brakes to catch up. This provides rear stability on wet surfaces and helps prevent front pad wear. There is no metering function with the disc/disc setup.

  • Residual Pressure:

Drum Brakes require residual pressure of 10 lbs. to be held in the line. This pressure keeps the brake shoes close to the drums giving you a more firm pedal feel. The disc/disc setup does not require this pressure.

  • System Failure Switch:

This valve has a system failure switch that will alert you when half of your braking system is not working properly.  The proportioning valve comes complete with the mounting bracket and connecting hard lines


Applications include, but not limited to:
  • 1957-72 Ford Truck (Remove Linkage, Use Brackets & Pedal Rod Extension)
  • 1964-66 Mustang / Cougar (Works on Manual Transmissions Only)
  • 1962-72 Ford Galaxie
  • 1962-70 Ford Custom
The Power Brake Booster included in this package is considered to be "UNIVERSAL" and is not intended to be a direct factory replacement for cars that already had power brakes, since modifications would be necessary.  It also will not work with an original Ford Master Cylinder that typically will have a 80 MM bolt hole spacing. This is designed to work with a master cylinder that has 3-3/8" center to center spacing.

Note:  It may also be necessary to cut the end of the booster rod to work with the bracket...this is normal.  Also, does not fit Ford Fairlane.