When I was a kid I collected hockey cards and the goal was to get the whole series. One year when Andrew was young we collected all the Hot Wheels that were released that year. When it comes to full size cars and trucks I often write about "sets" of cars.
When it comes to trucks we have a good start on the whole series.
We have my 49 - covers 47-54
Andrew has his 64 - covers 60 -66
we have the 67 long box - covers 67-72
we are missing 55-59
1958 Chevrolet pickup