Just nitpicking here. The 'WAG7 with WAP4 shell' does not actually use a WAP4 shell. Though it looks similar to a WAP4 shell, both shells are quite different (The WAP4's shell is almost 2 meters shorter, and is wider and taller than the WAG7). The WAG7 locos with the streamlined shells actually use the same shell as the regular WAG7 , but with modified cab sections.