kelsey hayes part and proportioning valve

If you are not truly restoring your car, you can eliminate it.

I've done that on 2 of my cars. Basically, the line from the MC for the front brakes goes to a tee on the frame rail and then to each front caliper. The line for the rear brakes goes directly into a Wilwood adjustable proportioning valve mounted to the frame rails below the firewall. A single line then goes to the rear of the car to the fixed bracket that transitions into the flex hose that leads to the factory tee on the rear end housing. You can also mount the adj prop valve near the MC (there are kits to do that) but I wanted mine to look somewhat stock.

One advantage is if you change components in the future, like adding rear discs, this will accommodate that.