I just went through the complete brake system on my 65 C 50 wrecker. I used dot three on it.My lines were rotted right off from rust. I bought everything brand new /master -all six wheel cylinders and a rebuilt hydro vac.I had to make and bend all new lines. A good source for parts is napa. I got my cylinders through a local dealer named cowans auto right here in greenfield mass. Where in mass are you. It is nice to have another crazy person amongst us. If I can help any further let me know. Been thier and done that.