you should have put your "mods, mileage, or whatever" in your initial post if you want relevant answers. depending on your current mods, mileage, and if your 4EAT has 60k or 260k on it will help determine what you can or should do to it. i dont know much about the auto's personally. never really considered one for this kind of car. but a higher stall converter is pretty standard for auto's in drag racing (came from the mustang world before my wrx)
you can probably brake boost a little off the line, to build a little boost and make your 0-60 faster. but im sure thats not good for your stock torque converter.