Brake Questions

Brake Questions - Help

Mattax said
'69 Fender tag may indicate if it was always disc brake car. Someone else here will know that off the top of their head.

I can tell you the pictures so far show a factory setup.
Those pictured are the 4 piston fixed calipers made by kelsey Hayes and used with only a slight variation through the '72 model year.

It is the correct distribution block for '69. The proportioning valve will be a little further back on the frame rail.

Your concern is well placed. However the good? news is that most replacement master cylinders from the big rebuilders (like Cardone) use the master cylinder you have. They convert it to disk/drum use by removing the residual valve for the front brakes. It will work fine, but of course in an ideal world the disks should have a larger reservior. I finally bought a correct mc this past year from Kanter Auto.

The other way around. Proportioning valve reduces pressure to the rear to reduce lock up. Drums are self energizing and need less pressure compared to disks.

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?