I looked at IMCDB page for this movie 
.
Like Brockway or Diamond.
I love that website more than IMDB.
I just searched some old truck brands. So cool.
Here is two Diamond brand trucks.
Chevy had cabovers and conventional.
Dodge's trucks were very unique. I loved how MASSIVE the front looked compared to the cab. They did conventional and cab overs too.
Ford's I remember seeing up into the 90s with their cabover and conventional trucks. But they've stopped now.
GMC had cabover and conventional as well. Very boxy. This is essentially the same as the Chevy variants.
I found this reason as to why the traditional American car brands stopped making heavy duty semi trucks and left it to Kenworth, Peterbilt, etc.
"Ford's reason (& I imagine it goes for the others, too?) was that the floor space taken up was expensive & better used for cars & light trucks. Big trucks use big components. Bug trucks need hevier-duty forklifts & hoists to handle the heavier engines, transmission & axles.
Ford has a big plant in Louisville KY that used to produce their large trucks. That's why their class 8 trucks used an “L” to denote the series. L-9000..anyhow, the square footage used to assemble large units was out of proportion to the the revenue generated. So they sold their class 8 stuff to Freightliner, who kept them going branded as “Sterling” for a few years.
It was something like 40% of the floor was used to produce class 8s, but only resulted in 15% of Ford's revenue…so they ditched the Biggie's to dedicate more floor to produce F150s. Looking back now, it was a wise move, because F150s are their best selling product!
But it is sad that GM, Dodge & Ford all got out if the market for big trucks. They all had rich histories in trucking."
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