Old thread I know; but now that it has been resurrected, I have to ask:
I see this quoted all the time: "other recalls 67-69 GM (not division/model specific): Rally Wheel trim ring clips..."
I have never seen any evidence or official paperwork on such a recall. So many of the four clip trim rings survived (I have four on my Z/28) that one has to wonder if it is a myth. Protocol would have been to replace them and destroy the old ones.