1976 Kenworth K100 Aerodyne Tractor by Road Kings Refrigerated Trailer by MNTrailers

That's kind of cool - you don't see many 'cab over' semi tractors anymore.

Cab Overs in America rode rough compared to the conventional cab trucks. That was their biggest drawback. 

Such a nice set-up!  .... I still laugh, because when I bought mine, I had NO idea this was the "BJ & the Bear"  truck.  There is a nice set of decals available for this truck.  I like them because they include pertinent truck info; therefore, it's accurate info.  (shown, but purposefully distorted to discourage copies )

@john3976 I thought their biggest issue was that they got poorer gas milage because they were much less aerodynamic - come to think of it that would make for rough riding too.

@franklemire I am sure there are more reasons but the one that always comes up when talking about cabover semis was due to sitting over the front axle they were rough riding. Plus the conventional cab truck has far more options for the sleeper configuration.

@john3976 - Interestingly, cabover trucks (lorries) are quite common in Europe.

Cabovers are used in Europe because they do not travel the long distances American truckers travel and they also have to deal with tighter roadways in their cities. There are videos done on this very subject comparing why Europe uses cab overs over conventional trucks vs America using conventional trucks. 

...all I know (from researching my 1/18 COE project ) is that America, at one time, imposed length restrictions on semi rigs. The "shorter the better,"  was the rule. Also, I did learn, as John points out, that most drivers HATED the ride quality.... noise, bumps, fumes, etc., were all par for the course.

@john3976 Lorry drivers are typically not driving as fast or long as long haulers in the US - They also have to deal with narrower roads once they are off the highways and there is less space for them in general so 'shorter is better'.