Yeah, since it smoking, I keep coming back to blown head gasket.
Wish I was there when it first started doing it.
In 300zx's, if the PCV valve is installed backwards, it will run really bad and smoke. but I doubt that applies to this car.

Add checking the fuel injectors to your list. You ought to be able to ohm test them still in the car, but in a perfect world, you would take each one out so you could see it spray.

This thing's been bothering me all evening and it isn't even my car. lol.