Anyone running the ford 7.3 diesel motor? How are these motors for towing heavy loads. I found a 2001 Ford F-350 XLT crew cab 6.5 bed with the 7.3 diesel. I test drove it today and it ran good. Also how long can these motors last for? What mpg can I expect with this 1ton truck being 4 door and hauling a 18ft trailer with two Dixie choppers on it? I need some quick info cause I am letting the dealer know tomorrow if I want to buy it.