Help! '69 Camaro factory brake setup

[bobby]

You probably have bad hoses or calipers. They are not expensive if you just want to back to stock replacements. You local auto parts store should have them for about $25 per caliper and $20 per hose. I couldn't see the porportioning valve or master cylinder being bad to cause this. And take all the lines loose and blow them out with at least 100 psi of air.