[4stanger]

[QUOTE=Rallye Sport;6588720]
Externally they received a '500' badge on the rear quarter in front the GT badge.

I always thought that 500 badge may have been pre production prototype for the Falcons that arrived a few years later with the 500 badge, but the ones in the photo definitely wipe out my thoughts on that, looks like a different font.
I have seen GT 500 at a local car show around here in Central Qld, a year or so ago.