So I'm trying to help a guy at work get his 87 Dakota back running. I keep trying to get him to send pictures of the problem. He says it won't run because the belt, I'm thinking V-belt he keeps calling it timing belt, keeps falling off. He thinks the pulleys are out of alignment. I have not seen any pictures of the truck, but I'm thinking the tensioner is failing and the belt is too loose. I know it's not much to go on, but thoughts?