My current truck is a little worse for ware engine wise might be looking to buy another truck. I got a lead on a '87 f250 6.9L diesel, 4x4, 4 speed, 8ft bed. I dont know the current mileage or any kind of maintenance history on the truck. Guy told me body is a little rough but frame is solid.

I dont know much about diesels and Im curious, is the 6.9L a good dependable engine? Anything I should look out for on this truck?