There are many posts in reference to this, I have an 04D 69 Z and it has been to the Camaro nationals twice, 2013 and 2014. I have the finger clips all the way around and they passed. It is "undetermined" what was actually used, lots of opinions. My car scored 4857 out of 5000 points and I have spent many tireless hours making sure this car is factory correct. After talks at the show with the prominent judges they are excepting both 4 clip and fingers so I have been told. There are no dates on the trim rings and center caps.
Good Luck in your search