Matt Younkin’s Beech 18

The Beechcraft Model 18, or “Twin Beech”, as it is better known, is a 6–11 seat, twin-engine, low-wing, conventional-gear aircraft that was manufactured by the Beech Aircraft Corporation of Wichita, Kansas. This model saw military service during and after World War II in a number of versions including the United States Army Air Forces C-45 Expeditor, AT-7 Navigator, AT-11 Kansan; and for the United States Navy, UC-45J Navigator and the SNB-1 Kansan. The Beech 18 is the most modified U.S.-certified aircraft design, with over 200 Federal Aviation Administration approved Supplemental Type Certificates on record for the aircraft. – from Wiki