Congratulations on your '68! These are truly enjoyable cars. They're satisfying cars that are powerful, comfortable, and reliable. People whose only exposure has been to modern cars find the performance of these cars stunning.
I note that it does not have a vinyl roof. Most of them did, and the lack of a vinyl roof today is a blessing.
I am especially fond of the '68 Coupe de Ville. For my seventeenth birthday, my grandmother gave me hers as my first car when it was only five years old, so I grew up automotively spoiled, LOL.
Early '68s, with the optional front disc brakes, did use a slightly different wheel cover, which had 12 cooling slots in the deepest part of the cover. Later in the '68 model year, the slots were eliminated, and the slotless covers were used for all, and then re-used for '69.
-Charles Fares