[Jimbro727]

I've had a problem with the brakes on my 78 T/A since I bought it a little over a year ago. I initially had a mechanic replace the M/C, prop valve, and parts of the brake lines, but that didn't seem to help much. I then replaced the drums/shoes/cylinders and calipers/pads - no significant change. After chasing the problem around, I ended up replacing the booster and M/C (this is now the second M/C, and I also bled it). The problem persisted - the brakes don't stop the car from a roll until late in the pedal's travel. I then decided to replace all of the lines (including the rubber lines) and the proportioning valve (again). Now every single part in the brake system is new. I pressure bled today, having just finished installing the lines, and everything seemed to bleed fine - some bubbles, then solid fluid, from all four corners.

The problem is the same - although the pedal feels slightly different. The pedal is stiff when the engine is not running, and when it is running, it's feather light, there's almost no resistance. The car won't stop from a roll until the pedal is floored.

Anyone have any idea what the problem might be? Absolutely everything is new. Is there any kind of adjustment on the pedal? I know there's two holes - the booster rod is on the lower hole. The upper hole has a screw and a nut through it. How much fluid do I need to bleed after replacing all of the lines - maybe I didn't bleed enough?

Any help would be greatly appreciated - I'm at a total loss here. Thanks!