That extra body line is just a chrome trim piece . http://www.bing.com/images/search?q=stock+40+willys+pickup&view=detailv2&id=E0AC5D93888D6ED7C2F8F88404C6871E1F86F094&selectedindex=11&ccid=cKD9daGI&simid=607999539630245279&thid=JN.zMUoivR2qXs4%2F2anr1Iceg&mode=overlay&first=1
Chris head down to GORNO(they are still open) and ask about that 76 truck . It might have been a dealer trim package they added. It was a big thing around here then, we even had a wagon train show up at our school in Michigan that year, One thing that we are missing about options on a truck is that dealers will do almost anything for money. If you want it and will pay they will change it in house.