hey just noticed this on the rear/front windows of the BA.. the blacked out surrounds are the same window line as the AU...
look closely at this pic of the BA fairmont ice mint and youll see the blacked out bits are where the au roof line would have been. maybe they couldnt afford to do the interior roof line... so left it as the AU... and then use the windows in the replacement for the BA in 2005/6... or even the cross over 4x4?
food for thought...
http://www.stillwell.com.au/barra/ghia/Images/0.jpg