Well, I got under the truck today to look around and see that the curved rod that the pedal is welded to is a round bar with the end flattened. The flat part has a single hole where it bolts to a strait, flat lever that actuates the piston in the master cylinder.
I'm second guessing the "adjustablility" of the pedal height. The only thing I can think of is to remove the pedal and attached, curved rod, then see if I can drill a new hole in it. The problem will be that I'll be drilling in the round part.
What do you think?