OK, I put a new alternator on my ZC the other day. To get it out I removed the master cylinder. I removed the brake lines from the master cylinder so I bled the brakes. After I got it back running I noticed a hissing sound from the engine bay. It was where the master cylinder bolts up to the brake booster. It wasnt bolted up tight enough. Well i fixed it and it stopped hissing. When the car is off and i pat the breaks the pedal gradually gets harder to push. This leads me to believe there is not any air in the lines. Whenever the car is running the pedal is really soft. The brakes seem powerful, but the pedal will slowlly travel to the floor. What is the deal? Why does it go all the way to the floor? Any suggestions are appreciated.