I did some thinking on it. I am going to see if I can get two 90° bends, a short length of pipe to the floor and a 10 foot length of pipe out the side of the shed. So one elbow would fit over the exhaust pipe and maybe angle a short pipe 45° to the floor so that it is not just straight down, then the other 90° to point to the side of the shed, and the 10 foot length to go out the side of the shed. The truck will be in the same spot for awhile so the set up doesn't have to move any anyhow. I just about gassed myself out of there this morning. It had set for a while without running much and I may be getting some oil slipping past the rings. There was a tad bit of smoke in there.