It's hard to say, find a nice clean, stock, and by that I mean nothing done chip, gauge, exhaust mods, you will have a better chance, my buddy has a 2003 with 180,000 on it and drives it like a truck, hauls 15000lbs+ atleast 20 times a year, only done 2 injectors, HPOP
, and oil cooler. I have 124,000 miles chipped with sct and a powermax turbo since 75,000 or 80,000 miles. And I pull 25000 on a tow tune and up to 15000 on my street tune, and still haven't blown them bolts yet. My 04 went at 70,000 miles and it was driven nice, and it needed head bolts, which they were still good when I sold it at 115,00.
It's a luck game I think. I will say they pull and run great.