Now reconnect front and rear brake lines to the proportioning valve and to each front caliper. Bleed the brakes, install the wheels and tires, and then have your truck aligned.

The 2-pound unit, PN: 260-13783, is used for disc brakes (to keep the pads close to the rotors), and the 10-pound unit, PN: 260-13784, is used to keep drum brake shoes close to the drums.

Read the Chevy High-Peformance technical article on installing and tuning a brake proportioning valve, brought to you by the experts at Chevy High Performance Magazine.

We'll address installing four-wheel disc brakes elsewhere, so this is article is about the relatively low-buck process of upgrading from front drum brakes to disc brakes on a 1968 Chevy Stepside.