The spark plugs are Bosch HR-9-DC+. I missed the fan clutch on the list above. I had to replace it because the PO had stripped the allen bolt. I had to grind it off. The new bolt is a torx head which is nice.

I keep seeing two different alternator part numbers. One has a longer shaft? Will the S600/500 alternator work for both?

I do have some amperage issues. When I turn the headlights on the blower motor slows down. I don't have an ahmeter to check condition, but the alternator looks original.