Kenworth’s fairly extensive bus manufacturing history has been forgotten, but buses were part of its portfolio from its beginning as the Gerlinger Motors Co. in 1912, and at one point were its most profitable product line.

The Model T was built from 1949 to 1957. 

The engine was the sturdy International-Harvester “Red Diamond” – a 450 cu. in. version for the 35 footer and a 503 cu. in. one for the longer model.

While smaller and less powerful than the Hall-Scott 590 and 779 cu. in. engines used in Crown school buses, they were no doubt more fuel efficient.

Shifting was through a Spicer 5-speed manual. 

https://www.curbsideclassic.com/bus-stop-classic/1949-57-kenworth-model-t-series-pacific-school-coach-the-bifocal-bus