I know my 72 XR-7 did not come originally with a hood ornament but, since I already have a hole in my hood...I got a new emblem to replace the old one. (eeewwww?).....the question is: How do I go about replacing it? I just have the top piece (the glass ornament itself). Do I need a spring depressor?.....by the way, I have all new XR-7 emblems on the car now. (grill+roof medallians) It looks great!!!