The 1970s were at the tail end of the cabover semi era, where truck cabs were situated over the engines and front axles. Cabover semis remain some of the coolest big rigs in American trucking history.

Of course, the Peterbilt 379 isn’t the quintessential Optimus Prime, if you will. The original design, as seen in the Transformers animated series, was based on a Freightliner FL86 cab over semi ...

According to the truck’s marketing, Chevy started with the superstructure and frame of its existing cabover semi-tractor, then formed a body of fiberglass and steel on top of it.