is it possible to install aftermarket headunit in fg falcon? would it fit at the bottom of the centre media/control panel?? also is it possible to run a headunit (aftermarket) and keep the factory headunit also? main reason is I want an integrated bluetooth setup iphone compatibility.
Any help appreciated.

Yes you can add an after market head unit below the existing one, I've seen if done in a couple of FG's. But I'm not sure how the bluetooth works, because you'd be running the speakers to the new head deck...thus having no sound form the old one...

hope this helps xD