Power Brake Conversion For a 65-66 Mustang

65-66 Mustang Do-It-Yourself Parts Kit

Kit Includes:

• Redesigned Brake Pedal Pin

• Firewall Bracket

• Detailed Plans for installation.

This kit also works with 1965 Ford Falcon with minor firewall modifications.

Booster Compatibility:

• Works with the 1983-93 Fox-body Mustang 4-cylinder booster, 1980 Fairmont booster, or MustangSteve-provided booster (same design).

• Ensures easy access to replacement boosters using original Ford parts.

Exclusive Features of the MustangSteve Power Brake Conversion:

1. Revised Pedal Ratio

• Reduces pedal travel, providing a modern car "feel" (~2" travel with front disc, ~1" with 4-wheel discs).

2. Additional Firewall Bracing

• Welds to the pedal support, preventing firewall fatigue and cracking around the booster mount area.

3. 9" Diameter Booster

• Uses a Fox Mustang booster that won’t fade after repeated stops, unlike off-brand or imported boosters. Replacement parts are available in the future.

4. Factory Fit and Appearance

• The kit fits and functions better than the original 65-66 booster, creating a more factory-like appearance and improved performance.

5. Dual Bowl Master Cylinder Compatibility

• Unlike original 65-66 boosters, this kit accommodates dual-bowl master cylinders without clearance issues.

Installation Details:

• Booster Mounting: The power brake conversion bracket (65-66 only) is made of 10 ga. steel and is welded to the front of the pedal support bracket. This creates a secure and neat installation for the booster, which mounts tight against the firewall. It can fit both a dual bowl master cylinder or the original Mustang master cylinder.

• Pedal Pin Modification: The pedal pin, where the original master cylinder connected, must be replaced with a new design pin in a new location. This pin is welded to the pedal arm and features a flange for strength.

• Pedal Height: The pedal height is slightly lowered, but still very close to a factory height, for a more comfortable driving position. The revised pedal ratio reduces travel, offering a more responsive feel.

• Transmission Compatibility: This conversion works with 1965-66 Mustangs with automatic transmissions. The kit ALSO fits manual transmissions with cable or hydraulic clutches.

Frequently Asked Questions:

• Will it fit my 4-wheel disc brakes?
  Yes, the kit fits any combination of drum or disc brakes, and the instructions specify the required master cylinder.

• Can it fit Falcon and Ranchero?
  Yes, with some extra work. A piece needs to be welded to the brake pedal to properly relocate the pedal pin. Early Falcons (60-63) must use the original-style master cylinder or Shelby-style export brace with a tandem master.

• Will it fit a 351W with Hedman headers?
  The kit clears short tube headers easily, although the header MAY need to be removed during installation.

• Why won't it fit my car with the original manual transmission?
  If you have an original toploader transmission with the factory z-bar setup, the clutch actuation rod will interfere with the booster stud placement. However, a T5 or TKX transmission with a cable-actuated clutch will work fine.