Top mounts on 99 leg OB - different than 90-94

[Chef]

Ok, I just went down to the wreckers and pulled the rear struts off a 99 legacy outback. Look great, everything went well, I was proud of myself for such a neat job done. I bought them, and left them at the counter while I put my tools back into my car.

On a whim I decided to measure the top bolt pattern on my old mounts. Lo and behold, they do not match the ones on the 99. The old ones have equal sides measuring 3 3/4" between each. The new one as one side 3 3/4, and two that are about 4 1/4".

Damn.

So does anyone know if the older mounts (say from a 90) can be used on the newer strut assemblies? Or will it not sit flush on the upper spring seat? Is this just an OB difference, or are the 99s differerent from the 95-98? If so, the sticky thread needs to be updated. I returned the struts, but may pick them up again if they are usuable with the 90 top mounts.