Well I just bought a 2003 ford 550 with 135,000 miles. It does have the infamous 6.0 I bought it because it was 4x4 with a 16.5 foot bed. Ford had replaced the motor under warranty at just over 80,000 miles, and then had new transmission shortly there after. I figured that If necessary I would put in a cummins as the truck meets my other needs. When I got it home it turns out that the egr cooler wasnt replaced when the motor was changed. So since i have the turbo off etc I might as well go ahead and do the oil cooler and high pressure oil pump while I am there.So then I SHOULD be good for another 100 K miles.The cab is tight and over all is in great shape, just gambling to get a few years out of it before any more major repairs hope you dont mind the comments. but I saw mark B has about the same thing also.