Great thought and find MJD65! I have spent the better part of the rainy NJ day looking for some sort of ad's or evidence in sales literature myself, and have come up relatively empty.
And, Mr.Speegle, I agree with you, I did divert away from the Autolite angle of this thread, but since I am re-doing my air cleaner this week, I got a little carried away with the "200" decal also. But, I feel pretty confident that one will go back to where it was on the front top of the air cleaner.
My best guess, and only a guess is that the square Autolite decal goes on the side of the aircleaner, much like the 66 8 cylinder one? Since it has no radius like the one used on the Chrome 66 6 cylinder air filter, it almost make sense?
Here is a pic of Bob Perkins 56 mile 66 coupe, I know, 8 cylinder, but it that square Autolite decal would seem to fit there real nice?
http://www.mustangandfords.com/featured-vehicles/mump-1003-56-mile-1966-mustang-hardtop/photo-gallery/#13Also, NPD part number D-105, is showing this Autolite valve cover sticker to be for 65-67 6 cyl mtrs. This is the sticker that is a rectangle and has no radius that I think is same sticker on Bob's near mint 66 coupe on the front vertical side of the air cleaner. (of course,his car is an 8 cyl car.)
https://www.npdlink.com/store/?p=catalog&mode=newsearch&search_str=d-105&parent=1&year=0NPD part number D-17 is the one they list for 65-67 Chrome Air Cleaner, they don't specify 6 or 8. It has a radius, so I would think it going on the back radius of the air cleaner might make sense, if you have a Chrome one, but in my case, I don't believe that would be right since I have a snorkel air cleaner, non chrome.
https://www.npdlink.com/store/?p=catalog&mode=newsearch&search_str=d-17&parent=1&year=0I also see a sticker on Bob's air cleaner, on the left side of the pic, which I am going to assume is the Air Cleaner part number sticker, which again, according to NPD is for 66 models only, no 6 or 8cyl specified. That may be another potential sticker that is needed?
https://www.npdlink.com/store/?p=catalog&mode=newsearch&search_str=d-109&parent=1&year=0That's my theory, without too much evidence to back it up beyond circumstantial evidence.
And, where/who is NPD getting their info from about decals and placement, that would be an interesting discussion.