I was getting my trailor repaired and the shop that was doing the repair happened to have a 86 0r 89(can;t remember) f250 duelly diesel for sale. The price was $4500 including a 16ft trailor. Both had good black paint and the truck had a good body. The trailor had electric brakes and duel axles. The truck did smoked considerbly and this turned me off. I have had a cummins diesel and it didn't smoke at all. I am not sure that model even is a true diesel. What do you guys think? Good deal or bad?