* 6.0L Power Stroke V8 Turbo Diesel: This was a popular choice.
* 5.4L Triton V8 Gasoline: A gasoline option.
* 6.8L Triton V10 Gasoline: Another gasoline option, offering more power than the 5.4L.
Therefore, there's no single answer to the engine size; it depends on the specific truck's configuration.