He'll probably keep his forever...it's a 95 f250, 4wd, ext cab, long bed. We've talked about doing a 12 valve swap if the 460 ever craps out, maybe beef up the frame, straight axle the front, etc.
It's a shame the gas big blocks went away(until the 7.3 gas a couple years ago.) I used to have a 2003 Dodge 2500 with the 5.7. It didn't tow as well as his f250, or at least the constant shifting drove me nuts. On top of that, the fuel mileage was only 1-2mpg better than the 460 when empty. That was back when gas was cheap, so I didn't care.
I've since replaced that truck with my 08 2500 w/ a deleted 6.7 and 6 speed manual. I think Dodge finally figured out the QC on the very late 3rd gens...except for the emissions systems, but that's not something I have anymore. It's actually been very solid and I don't foresee ever selling it.