There is some minor adjustment for both brake and clutch pedal height. It is just a real pain to get to. You have to lay on the floor with your head in the foot well. The overpedal linkage has adjustment bolts/fastners on it and you can change the pedal travel/height with these adjusters. Depending upon how large a person you are, you may have to remove the drivers seat to get in there, or, get a midget to help you. I did mine about four years ago, so can't remember enough to be more specific, other than it is possible.
Good luck,
DT