GP38-2s 423 and 478, GP38AC 649 and GP38-2 669 by Frisco.org Posted on March 13, 2018 GP38-2s 423 and 478, GP38AC 649 and GP38-2 669 GP38-2s 423 and 478, GP38AC 649 and GP38-2 669 at Fort Smith, Arkansas on June 8, 1980 (Paul Strang). This entry was posted in Slides and tagged 423, 478, 649, 669, Electro-Motive Division, GP38-2, GP38AC. Bookmark the permalink.