you cna remove your AC. as far as the ABS, i wouldn't, its a safety feature that you might need later on
Im a Xbox 360 fanboy...and damn proud of it!!
to remove the abs you have to redo the whole system.
from what i gather you have to get a new master cylinder with one out to the rears and the two for the front. and you may need to get a brake control unit ( pressure to the front and rear)
FYI if you didnt know already... when you pull the abs fuse out the braking is stronger in the rear causing slide outs if you are one that brakes into turns instead of before turns.
hope that helps a bit.