I made my own vacuum system using a glass jam jar with copper tubes soldered into the lid, a couple lengths of clear plastic tubing and my 55 chev as the vacuum source. Suck out the master cylinder and clean it out with new brake fluid, refill the cylinder and then go to each brake bleeder and attach the vacuum line and let it suck the new fluid though. You can see the clean fluid. It's an easy one man system and cheap.