Proportioning Valve

Manual brakes. Rear mounted the calipers, but bleeders are at the top. I adjusted the back brakes. I didn't bench bleed master cylinder so I think I still have an air pocket trapped in there yet.
I have manual front disc on my 67 Barracuda.
Never got a good pedal until I borrowed a power bleeder and power bleed the front and rear.
Night and day difference.