I seem to remember a late 1940's/early 50's GMC road tractor owned by my uncle that had a big gasoline engine with the carb on the passenger's side. I believe it had some sort of updraft carburetor, but that might not be the case. It was a conventional cab rig, not a cabover. He used it to pull a trailer for the big freshwater boats he repaired at his shop near Old Hickory Lake, near Nashville.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!