This is a complete bolt in power brake kit that uses a modern brake booster and dual circuit master cylinder mounted to the firewall. It bolts in using the original bolt holes for the factory air box and requires absolutely no cutting or drilling. 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 with a positive and firm feel. No more soft or sloppy pedal! 
 
Installation is fairly straightforward- no cutting of the firewall or drilling is required. This takes about 2 hours to install. You have to remove the driver side air box, master cylinder, original bake pedal, and then these parts simply bolt on to your Oldsmobile.
 
This is only for a 1954 Oldsmobile Ninety Eight or Eighty Eight. This fits no other years of Oldsmobiles! 
 
Included parts:
New heavy duty Firewall Plate 
Brake pedal bracket, goes through air vent hole 
Brake pedal W/ Bushings and rubber pad (appearance of a 1970's gm pedal)
GM style brake booster
GM style master cylinder 
New high quality bolts 
2X 3/16" brake lines- custom cut, bent, and flared
Proportioning Valve + metal lines (mounts beneath MC, pictured)  
3/8 Vacuum hose 
Misc. hardware 
 
Brake booster options: 
-9" single diaphragm vacuum booster in gold zinc. This is the best optoin for drum/drum brakes. Anything more will feel too powerful. This is what's pictured here on the website. 

-9" single diaphragm booster, in chrome, otherwise same as above option 
 
-11" single diaphragm booster in varying finish of gold zinc or black powdercoat. This is the best option for disc/disc or disc/drum. This booster is considreably more powerful than the 9" booster. Our supply of the finish is inconsistent so we provide which finish is available. 
 
-Hydroboost. This booster uses power steering fluid rather than vacuum. It is our most powerful booster, and over kill for most applications. The booster housing is longer so it may cause minor interference issues. This is best for high horsepower applications without a good vacuum source and with front disc brakes. 

Proportioning valve optoins: 
-PV4 works for drum/drum or disc/disc. It proportions the brake fluid pressure eqully front and rear. 
-PV2 works for disc/drum. it proportions the brake fluid pressure with a front bias. 
 
All metal parts are CAD designed and cut on a CNC plasma table for consistent high quality results, then painted in satin black. These parts will have an excellent fit and finish on your 1954 Oldsmobile because they are specifically designed for this particular car. Designed and built in Southwest Washington, USA.