Green Monster 3

The June 1990 issue of American Rodder magazine included an article given later, for #11, which reported that: "Green Monster #3 was undertaken to give brother Dale Arfons, Art's senior by eight years, a chance. It was to be powered by a Jacobs five-cylinder radial engine, but as it turned out, Dale was never really bitten by the racing bug and the project died before completion."

As confirmed by Aircraft Engine History Society, the Bomber Command Museum of Canada, and others, the Jacobs Aircraft Engine Company never produced a "five-cylinder radial engine" as indicated above. However, Jacobs did produce the seven-cylinder R-755 (company designation L-4) shown on the right. The vehicle shown has a radial engine but it appears to be a Wright nine-cylinder R-975