The spigot indicates it is a late model 5.0 pump. Since the diameter of the impeller is hard to determine in the pics it may be the later "small" diameter one. I would feel pretty certain it is a serpentine belt pump, so it will be reverse rotation. I believe it was '93, but it could have been '94, they went to a smaller diameter pump, which is the same as used on later Explorers,etc.