To the original poster:
First, I think you have to decide what year you are questioning. There were several years that AWB cars were popular, 1964-67.
It seems that the info I posted in my first post has been question but no one has responded directly to the questions of my second post.
I can tell you that Chrysler DID NOT build these cars on any "other line." The assembly plants had what they called "holes" in the plant that they would divert cars to that need special equipment or work, but it was limited to more or less small jobs.
It is factory documented that cars like the Daytonas, Superbirds, and 1968 SS Darts and Cudas were farmed out for the special work on these limited production work, just as I indicated with the 64 AWB cars. The winged cars were sent to Creative Industries for the special work required for theses cars. The 68 SS cars were sent to Hurst Engineering for their work. These were too large of jobs to be done in the factory "holes."
You can bet that if Chrysler would not build the 3000 or so winged cars in normal assembly that they certainly would not do the highly modified AWB cars in plant.
For more on this there is a long article that is basically an interview with an plant engineer from the Lynch Road pland from back in the day about how the winged cars were built. It is also loaded with great info regarding how things were done at these assembly plants. This is on the Winged Warriors website. If you can't find it I have it saved in email form that I will send to anyone that sends me their email address.
Maybe the book that I referenced in my previous posts is incorrect, but I doubt it. The book is loaded with detailed factory letters, part numbers, "how to" info for AWB cars, a 63-65 timeline chart, period pictures of cars, literature list and more. It seems to be well researched. It is an inexpensively limited run produced book that is hard to find.
Here is a link to info on the author I found. I did not read it but there may be info on how to find the book.
http://www.moparmax.com/features/2009/iv_9-hotrod-1.html
BTW, there was a small town Plymouth Dealer in Savanna Illinois, Ferris Motors owned by "Jumpin Jack Ferris" where I lived. He was on the factory race program from 1962-1967. He had a 62 Max Wedge, a 63, a 65 A990, and a 67 WO cars. He sold a lot of hipo cars including another 65 A990 car. Savanna is Only 60 miles north of Moline where Learner's was. The 65 was campaingned as the Torqueflite Tornado. The other A990 car was a 4 speed and he and the other owner often traveled as a team to race. the other car was owned by Larry Griffith.