Search in this section and you'll find plenty.
In short tho' to get rid of the air box involves some things called "air correctors" that are sold with a dyno-jet stage 7 kit. Without them the bike won't run for shit. I have no idea if they can be used with out all the other stage 7 jetting or not.
Oil control is usually accomplished by using one of the carb filters you'll have to buy to pull a vacuum on the PCV line you're are referring to.
Pull up the installation PDF for DynoJet stage 7 kit and you'll get the idea about oil control.
Sean Morely, banner at the top of this forum, makes a better alternative to this, but it retains the air box.
I've wondered about using the air correctors and non-stage 7 jetting myself, so I could ditch the box to make room for a bottle of giggle gas.
Stage 7 mileage sucks according to most people, I have no experience with it myself...