Finally, the F-7 and F-8 'Big Job' were heavy-duty commercial trucks. The F-5 and F-6 were medium-duty trucks offered as either a standard configuration, a cab-over-engine configuration, or as a school bus chassis. The F-4, meanwhile, was intended as a light-duty commercial truck. The F-1, F-2, and F-3 were sold either as pickup trucks or as a panel van based on the pickup struck with essentially the only difference being whether the cargo area was covered.
These were numbered according to their capacity, with the F-1 as the lightest-capacity offering and the F-8 as the most heavy-duty.
The first generation of the F-Series covered a range of chassis in a number of variants, from the F-1 through the F-8.