Attached is another picture of the block with labels.
On the car now there is no device rear of this one, there is only a device on the rear axle that the "TO rear drums" line goes to. It splits from there and goes to the rear drums. That COULD be a metering valve, but I am not sure. Today, I picked up a MC from AutoZone (
https://www.autozone.com/brakes-and...master-cylinder-brake-system/4143_0_2558_2867). See pic. This was designed for front disc and the rear reservoir that goes to "FROM MC reservoir to front brakes" is larger than the one to the rear brakes by a little.
Is it possible this is a combination valve that does proportioning, distribution, and brake failure alert all in one? Note : there is no wire connected to it to throw the brake warning light on the dash, I have not gotten to fixing that yet. I mean, really, they light will go on to tell you that your brakes failed as you hit the pedal, you will feel the problem when you hit the pedal, is that light necessary?
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