1965-66 Mustang Power Brake Upgrades
EXCLUSIVE FEATURES:
• Revised Pedal Ratio: Reduced pedal travel (~2" with front discs, ~1" with four-wheel discs) for modern feel
• Additional Firewall Bracing on pedal supports: Welded to prevent cracking around booster mount
• 9" Diameter Fox Mustang Booster: Superior fade-resistant performance with easily available replacement parts
• Factory Fit and Appearance: Better fit and function than the original 65-66 booster
• Dual Piston Master Cylinder Compatible: No clearance issues (original boosters won't clear)
CLUTCH PEDAL MODIFICATION (Cable Kit):
• Allows later model quadrant setup for cable-operated clutches (ideal for T-5 or Tremec transmissions)
WELDED QUADRANT KIT ADVANTAGES:
• Durable construction that won't loosen over time
• No small parts to wear out or break
• Constant radius cable pull for straight alignment
• Direct force transfer to cable, eliminating twisting
• Cost-effective for DIY installation
Compatibility: Works with MustangSteve Power Brake Booster and Ball Bearing Clutch Pedal Shaft conversions, reducing clutch chatter.
Installation Note: Requires removal of clutch pedal and pedal support. Provides long-lasting service and easy cable replacement.
Clutch Requirement: Later model 10" or 10-1/2" diaphragm type clutch needed (e.g., Ford Racing King Cobra)
Toploader or T10 Transmission: Requires fabrication including cable-type release arm, new pivot bolt, additional welding and threading of bellhousing.
FREQUENTLY ASKED QUESTIONS:
Q: Will it fit my 4-wheel disc brakes?
A: Yes, kit fits any combination of drum or disc brakes. Instructions specify required master cylinder. Also fits any original 65-73 master cylinder.
Q: What about Falcon and Ranchero?
A: Yes, with extra work. Requires welding additional piece to brake pedal to relocate pedal pin. 60-63 Falcon must use original style master cylinder or Shelby style export brace with tandem master. 67-70 Mustang/Cougar use the 67-70 specific booster and pedal offered by MustangSteve.
Q: Will the tandem master cylinder clear the shock tower?
A: Yes, clears by about 2 inches and doesn't interfere with export brace (except early Falcons and Comets where dual piston requires Shelby style export brace).
Q: Will it fit a 351W with Heddman headers?
A: Yes, clears with no problems. May need to remove header for installation, but clears fine once bolted in.
Q: Why won't imporved booster fit my car with original manual transmission?
A: Clutch actuation rod interferes with booster stud attachment point. However, works with T5 or Tremec transmission using MustangSteve cable-actuated clutch.
POWER BRAKE KIT FOR FRONT DISC/REAR DRUM SETUP:
Uses Fox body booster with 1" bore master cylinder for front disc/rear drum brakes.
Requirements:
• Pedal support and stock brake pedal modifications required
• Transmission Compatibility: Works with manual (clutch cable conversion) and automatic transmissions. Will NOT work with factory z-bar setup
CONTACT:
If you have used pedals or pedal supports from 65-70 Mustangs or Cougars to sell, email info@mustangsteve.com
Instructions:
65-66 Power Booster Firewall Template
63-65 Falcon Clutch Cable Supplement
