On the one hand ...If you look at John H White's The American Railroad Passenger Car, the fundamental strength of heavyweight equipment was in the fishbelly frame, its laterals, and the end collision posts.
While I've not seen engineering drawings of either the AT&SF Budd Hi-Levels or the PS Superliners, I rather suspect the engineering is more in line with the truss-type construction of the streamline era ...
ON THE OTHER HAND:
Engineering in days gone by had HUGE (orders of magnitude) margins for error. Modern engineering conserves materials...
SO...
YOU pay your money and take your choice.
I prefer to be well away out of the path!
John
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The City of Saint Louis (UP, 1967) is still my standard for passenger operations