30 rwhp is a bit optimistic. 20 is more likely. torque range is were you will see a big change. 30 ft/lbs or so and from the 2000 rpm all the way to redline. its a flat line.
i would sugest due the distance you are fromn the tuner do all the mods you are planning that affect the tune. air mods pulleys and exhaust work will affect the tune. try to get it in one shot. cooling mods wont affect the tune. the ecu can accomadate the small changes in some cases