Proportioning valve question

Let me make a suggestion. About 15 years ago, I installed a front disk brake kit in my 69 Barracuda. It came with an adjustable proportioning valve. It has a knob on the bottom that could be turned to vary front to rear pressure ratio. It works really well. As I remember, the brake lines fit pretty well. You could install one of those now. If you switch to disk brakes, you'll need a proportioning valve anyway.
That's the idea initially due to my accessibility to dist. valve. Swap it out for the combo proportioning valve as shown by Dana67Dart. I'm trying not to perform flaring procedure while under the car which I assume necessary to install non integrated proportioning valve.