I am having a problem with the clutch pedal return on my newly restored '54 Mercury.  I adjusted the pedal free play to slightly over  the first 1" of pedal travel as specified in the shop manual.  However, the pedal when so adjusted will not fully return to the same elevation as the brake pedal next to it.  If I pull up on the clutch pedal with my hand, I can bring it up to the same level as the brake pedal but when I let go the clutch goes down the 1" and the pedal travel starts at that point. .  I checked all of the parts on the diagram in the Shop Manual to make sure I did not omit a return spring but the only return spring I see is one next to the adjustable rod next to the bell housing and that one is there.  I know that there is another spring under the dash which connects to the upper clutch pedal but I think that this spring is designed to ease the amount of pedal pressure necessary to push the pedal to the floor and has nothing to do with making the pedal fully return.  Anybody got any ideas as to what the problem is?  Thanks, Alan S. Freeman