[cleszkie]

Custom isn't the word I would use to describe that set up. I think Mac Gyvered is more appropriate. I can't speak for the hydraulics side of this system, but I can speak for the pedal assembly with the rotating lever arm. On a non-Mac Gyvered clutch pedal assembly, the lever arm is attached to the horizontal shaft with splines and a pinch bolt. Sounds like your splines are wiped out, or your pinch bolt is loose or non-existent. I'm assuming that the piece of channel iron is welded onto the stock lever arm, covering up the splined end of the shaft and pinch bolt.