We also have an 1161 and a 2003 Ford F350 Dually with the 6 liter engine. We have 26,000 on it so you can see that it isn't used much. So far the only problem is one fuel injector went belly up. Have heard that this engine had a lot of problems and that makes me very nervous. We love the truck and the way it handles and the power of the engine. We sometimes pull a 18 foot bass boat and there is no lack of power. It sure would be nice to have the Cummins engine in it and that would be great but.......
It might be had to sell on account of the reputation of that engine.
Ford should be ashamed of itself for putting out such an engine.