I have a 351 windsor that is rebuilt and has 150 psi compression. I have Edelbrock aluminum valve covers that don't have baffles for the PCV valve or the valve cover breather on the opposite side of the engine that is vented into the bottom of the air breather. The problem I have is I am fnding oil on top of the valve covers after I have driven the car for a while and am wondering if it would be from the lack of baffles in the valve covers or if it may be actual blow by that is pushing oil out on to the valve covers. I do have the rubber grommets in the valve covers with the rubber diaphram in them to act as a baffle but I don't know if it's enough to stop the oil. The other thing I am wondering is , if that is the problem, why do I have oil on my alternator and plug wires on the pass. side if the PCV valve is at the back of the valve cover ?