For Africa only Scania, Volvo, Mercedes or MAN, you wont fine any body to work on US trucks, & parts lol goooood luck.
I have 26 years xper. on 10 car, on the beginning I was fighting bad habits from simple freight hauling, took me 2-3 years to drive lake in...
there is biiiiiiiiiiiiiig difference, the E is electronic control & have C block, better than B block, less vibrations, extra bearing, better...