Which year? On mine, the seats are really high and I have to actually sit way forward to make sure I can fully depress the clutch! Both seats will also move almost all the way within 4" of the back seat.
It may be possible to unbolt the seat from the track and move it into a set of adjacent holes on the track.
www.dieselgarage.com is another good forum for all brands.
Another option might be to raise the seat a couple inches to get more support on the bottom of the legs.