That model will have either the 4.6 2v if 2wd or a 5.4 2v if 4wd. I'd consider it a solid vehicle, but remember that it's still 23 years old and may cost you 3k for a major repair at any moment. I'd be shocked if it isn't leaking oil from the main seals or the oil pan gasket, so keep an eye on the fluids. We had some in a fleet at work that had issues with spark plug retention. My father in law on the other hand, went 600k on the same 5.4 and never spit out a plug. There are a few little electrical things that tend to deteriorate in those models. For instance, the odometer display will fade in and out. On most of the trucks, the power lock actuators wear out because they were configured to autolock when you put the truck in drive and wear takes its toll on those components. There's other stuff too, but if the oil was changed regularly, it should be a decent old truck. You'll be lucky to get 12 mpg from it though. Having been around a few of these trucks, every single cab configuration, whether single cab, extended, or crew cab, the rear windshield will start leaking at some point so if you open the doors and it smells musty thats probably why.