well it will be alot easier to get to the bolts if you take the battery and tray out. If you don't you'll need some kind of special monkey arms, its will just be easier to take them out. As far as the airbox, thats simple. Just take off the cover, disonnect it from the plastic thing on top of the throttle body and pull up on the air box untill it pops out of the rubber grommets securing it.
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L.O.S.T. #225019
2003 Sport 4x4
Patriot Blue w/ trail rash
Flex-Zilla 4" Lift
TrailRash hi-lift mounts
Other stuff you wish you had