1967 Mustang Power Brake Booster Install

67Fastback35 · 12-23-2007

I have a 1967 Mustang Fastback and I have installed a power brake conversion kit, however the booster does not seem to be functioning properly. The brake pedal remains very firm when the engine is running and the car seems to be braking slightly all the time. I have run the vacuum line to a port in the intake manifold and have verified the port is creating suction. Any ideas???

heavy metal · 12-24-2007

do you have a big cam in this car?you may need a vac. reservoir canister.

heavy metal · 12-24-2007

also adjust the peddle to booster rod,sounds like it is too long, holding the brake slightly.

5.0 in a 66 · 12-26-2007

Besides what was mentioned, you using a PDB pedal? drum/drum master cyl or whatever fits the app?