Anthony 7777
Thanks for the comment.
Sources notwithstanding, based on our collective research, I guess the bottom line is that Old English and Ivory are in fact the same color using the ICI code.
My old BT7 was originally this color, altho I've since redone it in a non original paint scheme (from Chrysler no less).
On Anderson and Moment, it's still the most comprehensive book I've found, and I've used it extensively for my two brutes. I don't believe anyone has written the definitive bible on them. For that matter, there's probably more collective knowledge on this website than any book.