I knew it prefigured the Golden Rocket's snout. If the cab was shifted forward on that, it would be much like my
Very Light VW design with it's panted wheels.
This was on JACG:
http://justacarguy.blogspot.com/2016/12/917-long-tails.html
I see some application to strap-on boat tails and hitch-mount range extenders, &etc.