I guess the truck had been sitting for a long time. I started it and it sounded strong. It smelled bad inside. I got it home. It had a hole in the floor and mice had been living inside. I started fixing it up a bit and it ran good when I drove it. It was banged up and I worked on the dance. I had the manifold bolts replaced and it’s quiet. I’ve tightened up the pan bolts and it doesn’t leak now, and runs nice for an old truck. It’s got a long ways to go.