Proportioning valve for rear discs

Subscribed, I have the P Jack SBP rear disc kit , not installed yet, for my 70 Dart with KH front discs.

I am going to get the Concentric one from Rock Auto, looks very close to stock. Advantages, looks stock, same fittings as stock, ready to bolt on, price. I'll add an adjustable prop valve on the rear line.

If you're not worried about stock appearance, then I would go with the Dr Diff, as previously mentioned. It comes with an adapter to bolt it up, about $90

What I wasn't told by PJ was that the rear disc kit will NOT work with 14 wheels. The directions in the kit stated this. So...I'm saving to order a full set of Cragar SS, 15x7, SBP, from Summit. Last time I checked they were about $250 each

I have had no luck contacting PJ after the sale.

Good luck.