I think Chrysler Australia ran car lines much longer than they did in the US. I suppose it's even possible they didn't get their "new" models until the tooling was no longer used in the US plants, and they sent the whole stamping forms over there. I don't know that for sure but it makes sense. Especially back in the 50's where it seems they sometimes would change things up every couple years.
here is a pic labeled 1956 Savoy ute.
https://commons.wikimedia.org/wiki/F...279722404).jpg