72 Duster Resurrection

Did you blow all the lines out, and see what came out? If its real rusty, and you bleed everything and get a firm pedal but still have problem getting the brakes to grab, you will need to check the wheel cylinders too. Water settles below brake fluid, wheel cylinders being at the lowest point in the system, and they could be frozen from rust.

If you end up replacing all 4 wheel cylinders, the rubber lines and master cylinder, and you blow the lines out really good with compressed air and some varsol or mineral spirits, i'd recommend at this time putting in DOT 5 silicone brake fluid since it does not absorb moisture like DOT 3 does. Whatever you do do not EVER mix the 2 different brake fluids. Use only 1 or the other.