look for rust, mainly ont he rear shackles for the leaf springs, make sure the trans shifts out good and the motor isnt making any crazy rattles, its a ohv engine as stated which in all honesty other than the head problem they are great engines i know tons of people who has got right at or over 300,000 miles, i just purchased a 96 got it cheap had some rust nothing overly bad, only thing ive done to it is service everything transmission, transfer case, plugs and of course the temp sending unit they tend to go bad on these motors ive discovered. Mine was neglected maintence but otherwise very well taken care of guess they figured if you kept the oil changed it would run for ever lol. mines only got 142,000 miles on it.