History of the C10 suspension

[Swar]

I'm sure there is a thread buried somewhere in here, but who knows about the rear trailing arm design? Who designed it, when and why? It is such a unique thing, how the arms are angled into the center of the truck.
My dad, who is notorious for over analyzing everything, is always perplexed by the design. But he got me thinking about it. The rear end will slightly shift side to side, but it moves like a pendulum.
Maybe this actually helps handle turns, by shifting the wheel on the outside of the turn back ever so slightly, and the inside wheel forward.
And for launching, the force from the wheels moves through the trailing arms to the center of the truck to push it, maybe another advantage over leaf springs.