The angle between the arms of the bell crank should be at 90 degrees, so pedal throw and clutch throw are equal. It's quite common for these to close up ver the years as the shaft twists, giving reduced clutch travel. There should be a tiny amount of play in the cable, you don't want to be dragging the release bearing all the time. A common mod is to weld in webs onto the arms to resist further twisting.
