Some things don't add up on my cargo van, a 1990 3.0. The PCV valve for a 90 caravan is a straight thin unit, threaded on one end with a connector prong on the other. I don't find any such pcv in this vehicle. The connector prong it too thin for hoses going to the air cleaner unit and don't see a threaded fitting for it. Anybody know what I'm missing here?