Valiant, I have a '67 Barracuda body with disc brake calipers hanging from the front rails. I don't know if it came (originally) with disc brakes because the front rails have been stripped. I need a proportioning valve (disc brake valve) for my '69 Barracuda. How can I tell if it is actually a disc brake proportioning valve or a distribution block. I guess I need a picture so I can compare????