Honestly, you're flipping a 2 headed coin and calling tails betting on not having a list of major repairs upcoming. Been/is a great rig, but MAJOR components aside, you're gonna be due for a lot of other stuff tomorrow or in the next 50,000km. Unti bearings, cv shafts, u joints, brake rotors, front end, a seal here, gasket there that cost more to fix than a weekend at the Marriot for a $10 part. Getting from here to 400k, injectors, turbo, transmission, etc are 50/50 chance IMO.
So far luck is on your side and it IS a good truck, but if I was buying a truck like that I'd want to see and arm long list of stuff that's been replaced or repaired already. Your $ is de valued, but my Canadian buddies say the deals are out there now too because of the cdn economy. I'd find some willing person who has to have a fire breathing diesel that runs good and sell it. Get your $10-15?k out of it plus the $5-10k you'll likely spend in the next couple years and pu that down on a newer rig.
Not being pessimistic, just know the likely hood based on the miles the truck has on it.
Just read a bunch of for sale ads for similar miles rigs and see the "new parts ____, ____,_____,______,_____" list and decide for yourself.
