For the US base we need more mid-late 40s car choices (small, mid size, and full size). At least 2 versions of each small, midsize, and full size for the early, mid, and late 50s as well as the 60s. As US cars changed so much in those times. Having a 57 X brand style in 1953 looks as much out of place as a 05 X brand being built in 1990 due to styling changes changed so rapidly in the 40s,50s, and 60s. When the US markets started using corporate designs and computer the styling for the most part became cookie cutter versions of the same thing. Starting in the 70s you could have more leeway in later-earlier designs, but before then it would look out of place.