I just went and measured my luggage rack.....mine is the same as the one that you are looking at. It is 30" wide from the centre of the mounting from side to side, and 15" top to bottom. Whilst the brackets may just cover a couple of the holes, there is no way on earth that they will hide the other two. And, yes, there are two holes for each mounting on mine. Whilst it will fit any MGB deck lid, if you already have holes from an original rack it's just not going to work.