He had a couple of people he knows bring the rig and prepare the 65 pound hog. Ivan, the fellow that did the cooking learned how to prepare the hog when he lived in Puerto Rico. It was stuffed with garlic and other seasonings, tied to a spit, and cooked for about five hours. The cooker was a design that Ivan was familiar with, and built by David Millette. His brother Tom was also involved in the endeavor.
Basic material is an oil tank with a center section added.
The fire box is an expanded metal grate on the lower front, the spit on the upper rear. It is semi-direct heat, not like a true offset. This gives some benefit or radiant heat from the coals. Click on a thumbnail to see a larger image. Drive system is a gear drive that happened to be in Dave's garage, the spit is a Stainless rod with a couple of added holders.