I'm going to try this website one more time for help. I have a 38 Chevy 2 dr sedan. I have replaced the master cylinder, 7"booster, combination valve,all the lines with 5/16 steel. I still have really bad brakes. When you push the pedal down it will move about 2 inches then it's like standing on a brick. The brakes have been bled a couple of times at first there was no pedal at all . Now the pedal is up but brakes just don't want to stop. Someone said it might be the rear wheel cylinders? Then someone said maybe not enough vaccum. I'm afraid in a panic stop situation it will not stop. Can anyone help please? Thanks!