Trains delivering cars in the early 70's, packed, racked, and stacked.

those cars appear to be Chevy Vega's

I've never seen this sort of thing, it's visually interesting

from http://www.jalopyjournal.com/forum/showthread.php?t=428585&page=477

1974 Spirit of America Vega, Nova, and Impala

Photos via: http://hotwheels.tumblr.com/page/19

GM tried a smattering of patriotism in hopes of using the upcoming bicentennial to boost sagging sales. The sales package was known as the "Spirit of America."
Chevrolet didn't even bother putting it in their sales brochures. For the Vega and Nova, it was essentially a white exterior applique trimmed in red and blue stripes, with an eagle banner proclaiming the historical logo. The interior was as tasteful as the exterior, bright red carpeting, white vinyl upholstery.

On the '74 Vega, the "Spirit' package actually cost more than either an automatic transmission or air conditioner.

Two exist in near showroom condition: http://www.sparky.on.ca/cvoa/vegas/spirit.htm

I haven't yet found a good photo of the Impala (Apr 7 09)