This is a styling proposal from 1968 for the upcoming compact Ford Maverick in the United States at the time, which was based on the North American Falcon platform. It's remarkable how much it looks like the XB series Australian Falcon, and has the XA-style nose ridge:
From this page, which is full of great Mustang/Falcon/Torino comparison stuff:
http://www.aus-ford-uk.co.uk/html/st...-_bonnets.html