68 Plymouth hubcap question

The data book does not show the dogdish caps at all, and neither does the link you posted.
How do you know the dogdish was standard?
The data book also lists the 67 Fastback came standard with the "Mag style" caps, which is the same as the "deluxe" 68 cap, but does not list any other standard cap.
Was the dogdish standard in 67 as well?

Semi-related question: all the radios are listed as options, and my car does not have any radio option code on the buildcard.
Would it have come with no radio with an open space, or a delete plate?