I was wondering what all other applications the 5. 9 has/is used in? I know there is a plethora in the Marine field, but what about heavy duty trucks, Industrial use such as generators, pump engines, ect. I've been told that the 5. 9's were used in some of the larger F-series fords in the 1980's, but I haven't seen any facts. I'm having a little :-{} with a guy who says the Cummins isn't used in any other applications then for the Dodge pickup, and so therefore the Duramax and PSD are better... I know this is wrong and I want to get all the material together I can to prove it :-laf