That is one of the peculiarities of the parts books. You go down to the next entry that has the dimensions and parts number provided, and that is what you need for that particular series of engines.
For example: If I was looking for my 1950 COE, I go to the line that says 40-55 COE. There is no information across the page so I go down to the line that says 47-55 D-D (1st Ser..) and use that information.
Is that clear?
Thanks for the link to this page. I printed it off because it is easy to see how confusing it can get, especially when you have replacement engines in a truck. Who knows, other than changing the oil and putting the proper amount of oil in it, whether the dipstick is the correct length.