Now I wouldn't want to rile a 427 Cougar by suggesting his motor only had one testicle, but I do have two articles written by different automotive journalists that say the same thing, written 17 years apart.
In 33 years, are you sure you have original equipment? It sounds stupid to me that Ford would take the time to adjust the 427 to a 2-bolt configuration, however, stranger things were done.
Perhaps there's is some truth to it. Your post is not as convincing as the articles. Got anything to back it up other than a growl?