I doubt they screw into the same holes, but think of it this way. I don't know much about the 3kgt spoiler, but if it only mounts on the ends (and not in the middle) you could always just put some sealant over it to keep water out, and then put the '97 spoiler right over it, no one would even see the holes, unless it has a mounting point in the middle of the trunk lid, then your SOL... 