Not sure about that claim since Mustang cars have been available here in Australia for over 50 years.

48 in total Mustang hardtop coupes were imported into Australia in 1965 as original left hand drive vehicles by Ford Australia and converted to RHD at their factory in Sydney before being sent out to local dealerships for sale in order to test the market. This was followed up in '66 with another 161 imported and the rest as they say is history.

A 40 foot cube container has an extra foot in height dimensions over a standard 20' and 40' allowing additional machines to be squeezed in along the top row sitting flat taking the total capacity to 72 machines.

It's more accurate to calculate capacity using internal cubic volume with metres as the baseline rather than the overall outer length in feet.

With a cube container and the increase in height you have extra space to utilise between the machine layers to add dunnage and minimise any possibility of damage.