I just picked up a set of the repo engine side motor mount block plates-the ones that bolt to side of engine block and that are all metal. Both sides look the same, when one is mounted on the one side it uses two of the top bolt holes and a third lower down, when mounted on other side it uses two of the bottom holes and one of the top- is this right? I noticed on a friends set of originals that they use all four holes (the repos only have three drilled)and they look side specific. Where the repos just done this way to save production cost?, or did I get sold two of the same side and not a set? Bought them off of ebay. Anyone have any experience with the repo ones?