1964-1974 GM Disc Brake Booster Conversion Kit Combo
1964-1974 GM Disc Brake Booster Conversion Kit Combo
Speedway Motors

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#91031978

1964-1974 GM Disc Brake Booster Conversion Kit Combo

  • Disc/Drum Set Up
  • Master Cylinder
  • Proportioning valve
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$315.99

/each

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Product Summary

Buick, Chevy, Oldsmobile, Pontiac, Tandem Outlet Count

  • Disc/Drum Set Up
  • Master Cylinder
  • Proportioning valve
  • 68-'74 Nova and'64-'72 Chevelle
  • 1/2"-20 and 9/16"-18 outlets
See more details

Key Specs

MFG. Part #91031978
BrandSpeedway Motors
Brake Booster Diameter9 Inch
Master Cylinder MaterialSteel
See more specs

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Speedway Motors 91031978 Details

When you put modern disc brakes on the front of your 1964-1974 GM midsize car, you should update the master cylinder as well. Why not go to this simple bolt on power brake system? The 1" bore Corvette-style master cylinder features two different outlet sizes to fit all GM applications. 

  • 1" bore master cylinder with 1/2"-20 and 9/16"-18 outlet
  • Disc brake conversion kit
  • 9" Slimline Single Diaphragm
  • Fits: 1964-1974 GM midsize car
  • Includes:
    • booster
    • master cylinder
    • proportioning valve
    • bracket
    • pedal rod extension and clevis

*Please refer to "Application" tab for corresponding vehicle fit.

Learn more about selecting the proper master cylinder for your vehicle by reading our tech article. Brake System Selection. 

Application

This kit is for 1964-1974 GM midsize cars:

X-Body (1968-1974)

  • Chevrolet Nova
  • Pontiac Ventura
  • Buick Apollo
  • Oldsmobile Omega

F-Body (1967-1969)

  • Chevy Camaro
  • Pontiac Firebird

A-Body (1964-1972)

  • Chevelle/Malibu
  • El Camino
  • Monte Carlo
  • Pontiac GTO/LeMans
  • Buick Skylark/Grand Sport
  • Oldsmobile 442/Cutlass

Speedway Motors 91031978 Specifications

KEY SPECS
MFG. Part #91031978
BrandSpeedway Motors
Brake Booster Diameter9 Inch
Master Cylinder MaterialSteel
GENERAL
Brake Booster TypeVacuum Diaphragm Single
Outlet CountTandem
Master Cylinder Bore Size1 Inch
Brake Booster MaterialSteel
Mounted Length12"
Master Cylinder Port Sizes1/2"-20 & 9/16"-18 IFF
Bolt Hole Pattern3.38" x 3.38"
Centerline of Holes3.38"
Reservoir IncludedYes
Sold in QuantityKit

Ratings & Reviews

4.4

9 Reviews

Overall Assessment

Customers recommend our product for its quality, easy installation, and enhanced safety features. The product is praised for its smooth assembly process and adaptability, notably in usage for old Pontiacs and Chevelles, to enhance the disc brake setup, making braking easier and safer. It is highlighted for a great fit and adjustability, specifically for the rear brakes, despite some slight difficulties with bracket alignment. The reviews consistently emphasize the product's quality and functionality, setting it apart from competitors. Users have expressed intent to repurchase, indicating high satisfaction.

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4.4

9 reviews

5

7

4

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this has not been delivered to my place in Zwingle iowa

1.0

7 months ago

fred

Zwingle iowa

Verified

this has not been delivered to my place in Zwingle iowa

Nice Piece!! As advertised.

5.0

a year ago

Mark

Senoia, GA

Verified

This product worked well. Installed properly and looked nice. Did not have any instructions, however. You should be experienced with installing them beforehand.

Would Recommend

I would buy this item again

5.0

6 years ago

None

Santa Ana CA

Verified

Things was great about the product

Would Recommend

I'd definitely buy this again when converting to disk brakes

4.0

7 years ago

Jason

Alvord

Verified

Makes stopping my old Pontiac a lot easier and safer

Would Recommend

Not fully complete but so far has his went very smoothly

5.0

7 years ago

No

Ks

Verified

Not done with assembly but so far everything has gone smooth as silk

Would Recommend

Quick and easy to install.

5.0

9 years ago

Randy

Duluth Minnesota

Verified

Good quality and easy to install.

Would Recommend

Buy this!!!!

5.0

9 years ago

Ninja

Kansas City, KS

Verified

I love this so much

Would Recommend

Nice kit

5.0

10 years ago

mikes garage

Allendale MO.

Verified

This fits really nice on the 66 Chevelle. Its defiantly helped out our 4 wheel disk setup. Its completely adjustable (rear brakes). The brackets are a little hard to get lined up and tight but worth it, I don't know how it could be made any easier.

Would Recommend

Great product, all necessary parts made

5.0

11 years ago

Patches68

Up North Wisconsin

Verified

The product was of great quality as expected but, Speedway needs to be commended for extremely fast shipping. Thank you for delivering my order days ahead of other vendors that I order from .

Would Recommend

Showing 9 of 9 reviews

Questions & Answers

6 Questions • 6 Answers

no instrutions with kit I bought.is there a video or something?

by mike

• 7 years ago

1 answer

View Answer

can I get it all in chrome or is there a full kit in chrome

by trucker mike

• 10 years ago

1 answer

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It says this kit will fit the 68-74 X-Body. But then it says Chevrolet Nova (1968-1972 ONLY?? Does this mean it will not work with a 74 Nova?

by Terry

• 10 years ago

1 answer

View Answer

1964 el camino drum to disc conversion I have a 1964 El camino and I'm ordering your disc brake conversion. If I purchase this 1964-1974 gm disc brake booster conversion kit combo, how should I plumb the new hydraulic lines to make it work? It currently has front drum brakes and single master cylinder. I plan to convert the rear to disc brake as well

by jus4fun

• 11 years ago

1 answer

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do you sell a brake booster combo that fits 1973 camaro with front,rear disc.

by albert

• 15 years ago

1 answer

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IS THERE A REPLACEMENT MASTER CYL. FOR THIS ASSEMBLY??? I BOUGHT THIS LAST YEAR AND NEED TO REPLACE THE MASTER CYL.

by

• 15 years ago

1 answer

View Answer

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Fitment

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