i just bought a 1980 el camino ss. it has a brake prob. the previous ower had a brake line break. and it looks like ALL brake lines are new. they bleed the brakes, no leaks, and still no pressure. so they next replaced the master cylinder. and no pressure. have to get to bleeding them myself this weekend. i drove it home it stops. i'm just hoping there is still alot of air in the lines. if you have any other idea PLEASE let me know