Keeping the tires on the smallish side will help keep the engine in its power band (meaning that if you added bigger tires, the engine will seem more sluggish).
On a 92 2.5, you might want to look into a 4.0L throttle body swap. I think your engine is new enough to be able to do that. Maybe bigger fuel injectors would help.
Also, make sure there's nothing wrong with your truck, like a bad air or fuel filter, or a clogged cat.