This is the General Aviation Freighter (GAF), designed by California-based Hawk Industries. It became known as the Gafhawk 125, and only one prototype was built, which first flew on 19 August 1982. The aircraft never went into production, and N101GH remained the only example of its type. It was initially equipped with a PT-6 turboprop engine, but in the early 1990s this was replaced by this Polish-built radial, which also powers the Antonov An-2. This unique aircraft made an emergency landing in a field in Alaska in 2011, and was abandoned at the accident site with only minor damage. It was still there by late 2017.
This photo was added on 15 July 2017, and has since been viewed 410 times.