* V6: 4.9L (300 cubic inch) inline-six was common.
* V8s: 5.0L (302 cubic inch) and 5.8L (351 cubic inch) were also offered.
Beyond Factory Options: With modifications (potentially significant ones involving engine mounts, wiring, cooling system, and more), many other engines could theoretically be fitted. However, this is a complex undertaking requiring significant mechanical skill and knowledge. Swapping in larger engines is particularly challenging and may require significant chassis modifications.
In short, there's no single answer to "what size engine will fit." It depends heavily on the work you're willing to put into the project. Stick with the original engine sizes for a simpler swap. Larger or significantly different engines will require extensive planning and expertise.
