I went back to look at the car again. It was a worthwhile trip since we made a deal. Transaction has not taken place yet but we shook hands and agreed on a schedule when I have to pick the car up by, seller insists no deposit or receipt is necessary till the transaction takes place. He gave me the keys to road test the car myself. He is friends of someone I know so he trusts me after our brief encounter.
I found the source of the oil leak. Some idiot who had the valve cover off last crimped the wire from the thermostat temp sender under the VC gasket!
Other bad things I found was green coolant, unknown date of last valve adjustment. The service booklet does have dealer service up to 134k miles but no receipts detailing exactly what was done. They were mostly oil changes.
I've heard that 85 has a different air filter than 84 prior? Can anyone tell me from this pic if it is an 85? I can't tell the difference from my 83 not having mine side by side.