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This is a complete bolt in kit that uses a modern power booster and dual circuit master cylinder mounted to the firewall using the bolt holes for the factory air box. It includes a new brake pedal that swings from a higher location (looks like it could be original too). A modern GM booster and master cylinder give a significantly improved braking feel and power while adding safety through the dual circuit system. 
This can be used with factory drums, disc/ drum or disc/ disc. Let me know what brakes you have at check out and I will send the correct proportioning valve. 
It will have the pedal feel of a modern car- minimal effort required but a good and firm feel. No more soft and sloppy pedal feel! 
Installation is fairly straightforward- no cutting required, this kit doesn't involve anything permanent that can't be undone in a couple hours! You have to remove the driver side air box and vent door, and then this kit bolts in. Brake lines are included and pre-bent. Installation time is about 4 hours. 
Brake Lines: Two included brake lines, one goes from rear proportioning valve to the original line that leads to the rear brakes (no cutting or flaring needed). The other brake line goes to the factory junction block where the brake light switch is located and threads into the now removed rear brake feed (again no cutting or flaring needed). This way, most of your original metal lines are reused and the brake light switch is completely unaffected! 
Does NOT fit the larger Roadmaster and Super, or any other years. This is only for a 1955 Buick Special or Century. 
It comes with everything including proportioning valve, brake lines, and hardware! All you need is brake fluid and a port on your intake to plug into vacuum. 
Also, you will have more room in the valve cover area that the original air box. so it clears all original 322 engines just fine, and will provide additional clearance for vehicles with a swapped engine. 
The firewall box has water drain spouts and new drain hose is included. water will be able to drain out from the windshield area just as factory. 
What you get: 
  • Firewall Box 
  • Brake pedal bracket, goes through air vent hole 
  • Brake pedal W/ Bushings and rubber pad 
  • GM style brake booster
  • GM style master cylinder 
  • All new high quality bolts 
  • 2X 3/16" brake lines- custom cut, bent, and flared
  • Proportioning Valve (mounts beneath MC, pictured) 
  • Hardare and brake lines for Proportioning valve
  • 3/8 Vacuum hose
  • Water drain hose, same style and function as factory 
  • Misc. hardware
Chrome parts are available. Brake Booster and Master Cylinder in chrome is +60
All metal parts are CAD designed, laser cut, formed on a computer controlled press brake, professionally welded, and painted satin black for consistent high quality results.

1955 Buick Power Brake Conversion Master Cylinder Booster Special Century G4

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