Most of the major handling and acceleration mods are identical for each. Like the gears, tires, sway bars, and so on. I'd keep the power stock as the only real improvement will come from a chip or new exhaust, which will remove the cats (and you won't pass smog in a million years). In fact, two of the mods American Muscle does in their bolt on packs are usually that - chip and remove cats.
Even then, you'll typically only get 10% more power.
I'd focus on gears and suspension since nobody notices the difference in a car that much in a straight line or on the highway, but getting sideways in turns or bogging down making a transition... that gets your attention right away.
Oh, and a few tasteful appearance mods as well. Fog lights being the first one, and then it goes from there