Ok, how many miles are too much on a 5.9L truck....
As with any motor, the answer, in part, is obviously "it depends on how well it was cared for." I have a friend that totaled a 99' Ram 1500, 4X4, 5.9 with 330,000+ miles on it. It smoked a little at start up, but ran very good. I'd speculate that it would have easily gone to 400,000.
EDIT: Look around ebay, craigslist etc at older Dodges. There are countless out there with 250,000 miles on them, still running strong. If the transmission on that '03 hasn't been rebuilt, it's probably due.
