Description
A proportioning valve is mandatory if you are doing a front drum to disc conversion. An adjustable valve is advisable and if you are installing a rear disc brake kit, it is mandatory. The adjustable valve allows you to dial in proper rear brake pressure. The factory proportioning valve does not recognize your new rear brake conversion. So rather than hoping all this will work properly, install an adjustable valve in line to the rear brakes and remove the factory valve. You can effectively dial in your brakes.
So this is how you should run your brake lines if you are using an adjustable valve.
For the front brakes – run the front line out of the master cylinder (generally the small port) to the proportioning valve. The valve is marked front line in. On the bottom of the valve the ports will read front out. Then install the front brake lines from the valve (marked accordingly) to the front wheels. For the rear brakes run a line from the master cylinder to the proportioning valve marked rear in. Install the line going to the rear end in the proportioning valve marked rear out. If you are still using rear drum brakes you will need a 2 pound residual valve part # W260-3278. Install this after the proportioning valve. The residual valve is used only with drum brakes. If you are using rear discs, you will not need the residual valve.
Note: There is a pressure switch installed in the proportioning valve that will turn on your brake lights when pressure is applied. This is great if you are using this valve on an old hot rod. If you are installing this valve on a car that has a switch on the pedal, you will not need to run power to the switch.
Experience Unmatched Control with the Combination Adjustable Proportioning Valve and Brake Pressure Switch for A-Body Vehicles
At Global West, we understand the importance of precision and control in your classic American muscle car. That’s why we offer the Combination Adjustable Proportioning Valve and Brake Pressure Switch (Part Number: W260-11179). This high-quality component is essential for any front drum to disc conversion and is mandatory for installing a rear disc brake kit. It allows you to fine-tune your rear brake pressure, ensuring optimal performance and safety.
Designed for A-Body vehicles, including the 1968-74 Nova, Chevy II, and a range of Camaro models from 1967-2002, this adjustable valve is engineered to recognize your new rear brake conversion. It’s built to withstand the rigors of performance driving, reinforcing critical mounting areas and preventing frame stress.
But we don’t just provide quality parts. We’re committed to supporting you every step of the way. Our DIY instructions and video tutorials make installation a breeze, even for first-time restorers. And if you need extra help, our dedicated customer support team is always on hand to assist.
So why not upgrade your classic Chevrolet with confidence? Check out our Chevrolet Parts Online for more quality components. If you’re working on a 1968-74 Nova or Chevy II, be sure to explore our 1968-74 Nova Parts and 1968-74 Nova Brakes categories for more tailored solutions.
