I was looking through rrpicturesarchives and I came across CNW 504 in Evanston, IL. It says that it is an E9BA. What is this engine, why was it made this way? I would think it is a rebuild. Looks like a F40 but defiantely isn't. Could anyone help. Here's the pic.http://www.rrpicturearchives.net/showPi ... ?id=862286