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I have a 1972 Chevy Nova with drum brakes all the way around.

After analyzing the issue, I am not getting brake fluid coming out of the Distribution Block for the rear brake line. Front brakes are working fine.

Brake fluid is going into the block from the large front chamber of the Master Cylinder.

I am assuming the distribution block is bad. Does anyone know where to get a 7 port brake distribution block as identified in the diagram or pictures below. I found similar Brake Hold-Off valves to what I have. Everywhere I check online has a 5 port and are mostly disc/drum.

The brake pedal only goes down about half way and not to the floor.

The diagram shows 7 ports which includes 2 lines for the Brake Hold-Off valve.


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