disc brake checklist

You're going to need a disc/drum specific master cylinder. Next time you're under the car look at the back where the main body line meets the rubber line that connects the back brakes to the rest of the system. You'll have to cut down/flare a small metal line to connect the female end of the proportioning valve to the femal end of the rubber hose. The main body line is a male end a will connect to the other female end of the proportioning valve.

The proportioning valve is single in and out, female ends. Many ways to skin the cat though. You can put the adjustable valve wherever you want too. As long as it will affect just the rear brakes.

Yes, you can then adjust how much pressure goes to the back. I even used it as some backwoods linelock type deal lol. Just close it off. No issues with it yet