I converted to vacuum brakes and I have a question about pedal travel. Is it normal to have the pedal travel almost to the floor (end of pedal travel) to stop the car. If you slam the brakes the car does stop and sometimes locks up the tires. I installed a reman brake booster and master cylinder. I have checked for air several times and I have now replaced the master cylinder with a brand new ac delco. Still have the same issue. It feels almost like there is not enough resistance when pressing the pedal. The pedal doesn't feel firm. It doesn't feel like your normal vacuum brake setup. I have 16'' of vacuum in park and 13'' in drive. Any help would be great.