Top gear African Adventure was my stamping ground from late 1950s. In those days most things worked and roads better maintained but still rough, corrugations, pot holes, rocks etc. My Ponton had factory fit sheet steel underneath (colonial specs) from front to rear bumpers and about 12 grease nipples on the front suspension and 3 more on propshaft and rear supension. Only thing changed were shockabsorbers and bump stops.