FORD FLATHEAD 6

This is NOT the engine in my 1988 Ford F150. But I am smitten by its simplicity. Only 90 HP - but it delivered full torque at 1200 RPMs. It was found in Fords from 1941 to 1951. For a few extra dollars many chose the Ford Flathead V8. 

The camshaft was drive by gears - no timing belt. This engine only had 4 main bearings.