I also recommend if your going thru it and changing everything out for new lines included, use DOT 5 silicone based fluid, and mark your master cylinder as such so dot 3 doesnt get mixed in later on by accident. Dot 5 is silicone based. It doesnt collect moisture like dot 3 does eventually causing rust in the system, also dot 3 will strip paint off your cars paint job like paint stripper will if left on long enough. Dot 5 wont do that.
