King Kong's 7' tall Mechanical Heart Concept - After being shot at and falling off the Twin Towers in the original De Laurentiis 1986 movie, one of the only ways to revive him in the second movie was to replace his failing heart with a Mechanical version ( It was all the rage at the time )
The illustration was originally drawn out, Xexeroxed, and then Marker Pens were used to render the heart up.