powerstrokenation.com and thedieselstop.com are both valuable websites that are dedicated to Ford diesels. You have the OBS (Older body Style) and there are a ton of them still around. They are a good truck. As others have said, change all fluids right away so you know they are good and get an oil analysis done. That will tell you a lot about the engine condition and also how long you can go. You need to provide mileage on current oil so if you dont know how long the oil has been in their, change it once and get the analysis done after 3000 miles.