Bob Chaparro wrote:
"Photo: Delivering A 1957 Chevy
End door boxcar:
https://66.media.tumblr.com/c3b25a8a106e913adac4a0061d1acb77/tumblr_n7jd1n0aG81qcdxvpo1_1280.jpg 

Actually enclosed bi-level auto racks. These cars lacked side doors.  Sylvan once offered resin models of these early CN cars in HO scale.  CN later lengthened the design to 75 ft, and these cars were acquired by Auto-Train Corporation, later going to Amtrak.

Ben Hom