What is it that you're trying to accomplish? What would you like the car to do that it's not doing now?

If you want a little, cheap (free) boost, just make sure your initial spark advance is set to maximum within spec (18 degrees). This will give you a slight but definitely perceivable boost across the power band.

That's the only free thing I can think of, but if you tell us more about what activities you're participating in that you want this torque, that would help us advise you.