Ok, how many miles are too much on a 5.9L truck and what are some of the things I should look for?
I'm planning to look at an 03 Quad Cab SLT 4x4 with a 5.9L but it has 161k miles. The body and interior are in good shape based on the pics but I don't have documentation on how well it was maintained. It's being sold by a one-man dealer who buys at auction and then flips on craigslist.

I like that the truck has the 5.9L, tow package, skid plate, 3.92 rear, anti-spin rear.

I know ball joints are an issue on these things along with the plenum gasket. Anything else to look for?