proportion valve or distribution block

[easyrider]

I put power brakes on my truck and it came with a proportion valve which I included with the installation. 4 wheel drums...I'm having trouble getting brakes and the light on dash won't go off. I've been told that my 68 didn't come with a proportion valve and I'm not even sure about it coming with p/b. So, I was told that what I needed was a distribution block instead, but when I tried to find one to purchase, no one knows what I'm talking about. I was going to put disc brakes on front, but because of the pandemic, no one has the parts I need and no one knows when parts will be available. So, I decided to stay with the drums all around until parts become available. If I can't find a distribution block to connect line from wheels to m/c can I just bypass the block and just run lines straight from wheels to m/c?? I'm going around in circles and am not accomplishing anything. I need to get brakes, so help me figure out what is the best way to connect m/c to wheel lines. Any and all information will be appreciated. Thanks....