theres really not much you can do to get more power. keep it mantained and itll woork good. if you redline alot it will loose power over time.
i mean could switch to a synethic oil might help out, less friction( so the world is told)
the next thing would be swap the air filter if they make a cold air or ram air kid, that might help.
( but proformance air filters have bigger pores for air to go threw easier , but it also lets debre through. so it will do more bad than good. but i f u really want u can go to
summit racing equiptment.com
and put your truck in there and itll show up any proformance parts for ur truck.