Grigg, that makes the most sense, I have not taken one off yet but, I see flashing from the casting around the top port so, I don't think this was something that was welded on, but rather actually cast that way. I am real curious now to get one off and see if there are any casting numbers or other markings on it!
This was a grain truck, they wanted to keep the exhaust up above everything so it wold not catch the fields on fire, I think they succeeded in that!
