Disc Brake Hold Off & Prop Valves

once again, I have the Mopar 73 and up disks / calipers on the front and a Dr Diff disk kit on the back. I spoke with Cass / Dr Diff, he recommended staying with the OE distribution block.
I used new brake lines and an OE 68 drum brake distribution block from Inline tube. The distribution block is just that, no front to rear bias, it works fine on my car.
Inline Tube - The Professional Restorer No1 Choice

the brake lines from Inline tube fit great, the distribution block was an exact copy of the OE unit

for your specific installation, you should contact the tech group at the company the put together your disk kit, they should have a recommendation.