Hello all, This is my first post. I have been reading articles on here for awhile now and think this is a wonderful site. I just bought my first Z a couple of weeks ago. It is a 1971 240 with an L6 engine. I was coming home tonight and lost most of my brakes. When I press on the pedal, even slightly, I hear a hiss. Also, the rpm shoots up about 500. I did a search and a couple others in the last four years have had the same problem. In their posts there are no solutions. Thanks for all replies!!! SavannahZ