Looks like you're right on all counts! I knew the movie was mostly filmed outside of the US, but I figured most of the cars were American. The Standard looks smaller in your pic than it does in the movie, which is why Packard came to mind, but it has to be the same car.

I've never seen anything like the Tempo Matador, really strange looking...but I like it!

Good call and the Mack too, I missed that when I watched the movie earlier.