Hello all. My first post on the site.
I just finished my engine bay project on my May 1965 A-code Dearborn Convertible, 5F08A736023.
I've read multiple threads, posted to restoration groups, questioned parts shops, etc. I'm clearly puzzled on the Autolite Spark Plug decal. I've read it matters on the assembly plant, the engine code, early vs. late 1965, decal inventory, and even the specific employee that put the decal(s) on any given day. A fun algorithm indeed for folks that want it "correct".
I own the book "Collector's Originality Guide Mustang 1964 1/2-1966" by Colin Date. For 1965, there are some engine photos that show the rectangle and curved decal. I've attached them below.
The stacked engine photos are stated as C-Codes, showing both the curved decal on top of the air cleaner lid, and the rectangle decal placed on the driver's side of air cleaner pot.
The single photo caption states it is an A-Code and is showing the curved autolite spark plug decal on the top of the lid.
The vast majority of people are telling me to place this decal on the driver's side air cleaner pot, including my restoration shop (Mustang Restorations). But several have told me otherwise, much like these book photos.
My last bit of input is conflicting parts retailers. For example, CJ Pony Parts says the rectangle decal is for a 65-67 6 cylinder here
https://www.cjponyparts.com/jim-osborn-reproductions-decal-air-cleaner-autolite-spark-plug-6-cylinder-1965-1967/p/DEC352/, while they show the curved version for V8 engines here
https://www.cjponyparts.com/jim-osborn-reproductions-decal-air-cleaner-autolite-spark-plug-v8-1965-1967/p/DEC160/.
Kentucky Mustang shows the same.
Any help would be appreciated. I'm perseverating on this single sticker.
Thank you,
Steve