Its a 05 f450, I think he huals a big horse trailler with it. As far as mods he has a edge juce with atitude, heads studs that have been in for over a year when I did the headgaskets. Hes kinda farmer and I don't really think hes beating his truck that hard just hauling big loads. he has no fluid damper on it. We replaced the cover and pump, price wasn't bad under $400 for a kit from ford, and did an oil change, flushed some though the oil filter houseing and cleaned the oil filter houseing(wich I didn't find any steel in for some reason) truck still wouldn't start, pulled the ipr, screen had steel on it, so i changed the hpop and started, but had a miss, so we did two injectors on one side and it runs okay now, but could probably use one more injector on the other side. Oh and about ten min after it was running at idle the turbo started squeling really bad so I changed that too. I'm really wondering if the oil filter really works that well lol. It may be a lifter, but if the lifter was worn baddly enouf too spit out steel the truck should thump out the intake i would think. I had a used engine i installed do that from initial startup, that one had the filters bearing in tact, but the rolller and cam lobe were wore right out. That was fun to change lol. I sure hope the engines bearings didn't get any shrapnal in them.