McLean was our next door neighbor, in the late 50's they along with Akers Motor Lines ran DF 860 GMCs, with 5spd, 2 spd axles, 471 Detroits.
We ran same tractor with 671 Detroits and hydramatic trans, we gave those underpowered guys a hard time when our transmissions didn't fly apart.
I recall a McLean sleeper team pulling old Fancy Gap, one driver tied a rope to the bumper, walked in front with it across his shoulder, like he was pulling the truck.
Some one made a picture, it got on the front page of the Winston Salem paper, both drivers were fired.
The union put them both back to work.