Universal 7" Brake Booster and 1" Master Cylinder Kit for Early Hot Rods and Trucks: Frame-Mounted, Fits Auto Transmission, Dual Reservoir, 6:1 Pedal Ratio, Under Floor Power Brake Conversion - Walmart.com
JEGS 631231: Hot Rod Bolt-On Frame Mount Power Brake Assembly | 1928-1931 Ford Model A | Disc/Drum or Drum/Drum | Includes 7 in. Dual Diaphragm Power Brake Booster, 1 in. Bore Master
Troubleshooting A Hard Brake Pedal | Classic Car Restoration Club | Classic Car Restoration Club