Jim,the m880 was the 77 dodge. when I was in the army in the late 80's/early 90's my unit still had a few of them,they were being phased out. good thing to,they were way underpowered when they were in contact truck form. not sure if it was the 360,most likely the engine was the 318,but with all the tools and box on the back,it felt like the engine was a 4 cylinder. the GM version with the diesel was much better in the power dept,believe it or not.