Doug, if I understand your question, the contours of the body of 3109 are more correct than those on 3107.
From before I even saw a 427 Cobra up close in detail, I'd hear owners "debating" about how other cars were "wrong". They were talking about things like the rear fender flares and how CSX 3200 cars with 428s weren't "real Cobras".
I suppose the term "more correct" is consistent with that "Cobra social etiquette"?
This isn't a complaint by me. Just an acknowledgement of, "that's just the way it is" and I suppose part of the mystique to the Cobra?
I will always value and seek out your friendly yet factual views on Cobras. Thank you.