Marty, are you talking about this one that includes the proportioning valve? I didn't see just the distribution block listed by itself on their web site.
https://www.npdlink.com/product/dist...ve-assy/186692
But maybe getting a complete repro is better in the long run. My original proportioning valve can be rebuilt, but by the time I buy that rebuild kit, the hard lines and the brake warning switch the price difference isn't that much.
I like the idea of keeping original parts on the car when ever I can, but I'm not going for a concours restoration.