Flat nosed cabover trucks are still very common in Europe because of total length restrictions on many roads. More nose=less cargo volume.

Don’t read into the patent drawings too much, they are usually made by the patent attorney working with an illustrator, based on descriptions provided by the inventor. And Figure 4, in particular, looks to be a functional block diagram that is meant to exclude any implications of absolute or relative physical size or…

FWIW, I think that article says the 73 Carina was $600, and the 66 Crown was “priced more than nine times higher than the Carina”