those two things will make "quicker". smaller pullies make it easier to spin than the larger and heavier factory pieces thus, the engine doesnt have two work harder to spin all the assesories. Closer gear ratio gives you a higher gear reduction causing the engine to build rpms faster... i mean quicker.
If you wanted it to spin at higher rpms you would have to balance your internals to a higher rpm, valve springs would have to be stronger, rev limit changed etc, etc. no real reason to do all that though, unless its strickly race.