proportioning valve

Gus, I'm in the same situation, doing a disc brake upgrade on my '67 9" drum car. I was thinking of getting some pre-bent lines to fit a '73 era distribution block that I got on FABO. It has a warning light switch, proportioning and metering valve.
It's also good to do your own flares, if you have good brake lines. Remember to put on the nut before you flare the line.