* 4.1L (250 cubic inch): This was the smaller of the two inline-six engines.
* 5.0L (305 cubic inch): While technically a V8, there was a 305 cubic inch small-block V8 available, and many consider it a six-cylinder competitor in terms of size and application. It was a common choice.
So, the answer depends on whether you're strictly looking for inline six-cylinder options or including V8s that filled a similar role. The most common six-cylinder was the 250 cubic inch (4.1L).
