I've searched the HAMB and looked at a lot of pictures and can't figure it out for sure. I wish I had one of each sitting next to each other in my garage so I could just measure, but I'll never be that lucky. I know there were several subtle changes from 1961 to 1962, but I'm not sure if the fins got shorter in 62 or not. Anyway, could someone please hook me up with some hard evidence, some kind of measurement and some closeup pictures would kick ass to totally put this question to bed. Thanks.
Im no expert, but I do have a 1962 Cadillac and if I recall the fin was a little smaller or less of a "point" right where the taillight mounts to the fin. I know that all the rear taillights are different from 61 to 62 model year. You can try a google image search? that may help you Brent