What Zion said.
There are very few pups that I've installed that I DIDN'T tweak just about everything about it...pup height and angle, pole piece heights, pole screw compositions (1022 to 1014), magnets, wiring (series, split, parallel), etc.
Pup adjustments are a personal thing and depends upon you tastes/preferences, the specific guitar, the type of music you play, and the rest of your equipment.