I am looking at a 1987 Jeep YJ Wrangler for my son, it has about 141,000 miles on the 4 cyl. engine wih a new head gasket and milled head. Is there a history with this year Jeep? I seem to remember something about AMC and bad 4 cyl engines, but alas I am a Tacoma driver. Please, any input is welcome. From the description and pics it looks straight body wise.