Front disc conversion - stock prop valve or adjustable?

[Dana67Dart]

Depends on what you have.. if it was like mine, old drum/drum it's literally just a block with ports in

Early A?
67 up got a brake warning light.

 

[RGAZ]

Here is what my 73 has.

Looks like the warning switch dist block. I disabled the light anyway when I rebuilt the dash so I guess it will not matter.

 

[Dana67Dart]

Here is what my 73 has.

Yep distro warning only block. Same part in 67-70 something with a prop valve down stream on the frame rail.

The 73 up distro / warning/ prop valve is an all in one direct fit replacement to what you have