Always look at the rockers and then inside the trunk at the tops of the strut towers. Those are the common GP rust areas.
Take it up to speed and see if it has 4th gear. At 168K the 4th hub shaft won't be in great condition if it's original.
Pull off the valve cover cap and look for signs of crud or cleanliness. Caramel rockers are normal, black is a lack of oil changes.