If I am not mistaken, Cummings is owned by F***. It just happens that D**** happened to use them first. I used to operate a F*** 16 Ton crane truck that had a Detroit diesel. Detroit is General Moters Division and even says so on the Valve covers. I dont know what size that engine was, but it would run that crane at 60 mph all day long and wasnt overly complicated with computer junk.
Ralph