From what I could gather, it’s a sleeper cab from an ‘80 Mack R Series truck that has been dropped (almost literally by the looks of things) onto an ‘80s Chevy heavy-duty truck frame.

It's not every day you find a 55-year-old semi truck ... The GMC Crackerbox might be the biggest nostalgia hit for fans of old-school heavy trucks. ... That’s what makes this 1967 with a custom ...

Custom semi-trucks, with wild paint jobs and gnarly body work line the streets of downtown Nacogdoches, drawing in trucks from Ohio, Louisiana, and Indiana, like Dickerson’s truck “Storm Surge.” ...