Auto or manual? How many miles? I have an '87 F-350 XLT Lariat, T-19 4 speed. Glow plugs, easy to replace, but they do wear out. Wiper governor on the intermittent wipers is a known bad, the wipers just stop and restart, or only work on one setting. The moisture seperator. Injection pumps and injectors. Block heater is probably burned out. All are really just wear parts. Mines at 257K. I did the clutch once, the injection pump and injectors have been replaced once, but they are due any time ($800 in parts). Axle seals on the rear axle, another wear part. Pretty much a bulletproof truck, as far as I know there aren't any lemon parts, but by that age things are worn. My stepfather ordered this one from Ford, he used it to commute to San Fransisco Bay, he was an engineer on tugs.