Well, about the only help I can give is CF7s are rebuilt F7s so if you need the frame measurements look up EMD F7 or try searching Santa Fe and find a historical society.
Hope you find something out, Woody.
http://www.alco628.com/wizzav.html
Ask your model shop to order one or search online book stores through a search engine using the book title. Has drawings of both versions and more information than you could ever imagine, even a full roste of each unit and what happened to it at time of writing. Tons of pictures.
Andy, I do not have a clue what a CF7 is, but I'm slowly collating the largest resource of Railway drawings on the web (I wish) my new site (link below) is about 10% complete, but I already have some ALCo's listed. The Fallen Flags or Trainiax sites are probably your best bet. You'll find them in the contributor's Box on the right or via a search.
Good luck, but I'll make a note and if I find something I'll let you know.