1971 Comet Disk Brakes

If your bleeder is at 10 o'clock you have the callipers on the wrong sides. See http://mmb.maverick.to/showthread.php?t=76951 for pictures of the callipers mounted on the wrong sides.

 

If you already have a 4 brake proportioning valve under your master cylinder, why do you find that you need another 2 pound residual valve in the rear line? The proportioning valve should be holding those calipers close to the rotors by itself.

I've used the blue 2 pound disc brake residual valves in my stock cars but never with a proportioning valve. Just by themselves. Also on your blue valve, is the flow arrow pointing towards the rear?

Not to say it has anything to do with your problem but just thinking

Oh and one more thing- - - from Northeast Pennsylvania