The basis of my argument is the truck which Pruett and Chandler drove. The truck used in the in the both the movie and the series is a Kenworth W-900, however, the W-99 used in the movie was equipped with a 48" sleeper compartment and low-back bucket seats. That was a basic setup in big trucks in those days.
The W-900 in the series sported a modular 64" sleeper with high-back seats in the cab as well as other luxuries. That represented what an ultra-luxury truck looked like in the mid 1970's.
The W-900 in the series sported a modular 64" sleeper with high-back seats in the cab as well as other luxuries. That represented what an ultra-luxury truck looked like in the mid 1970's.