if you have the front and rear, and the drives mount on & snug in that picture, I kind of feel like one of the mounts you have is DSM and not galant (I can't remember if it's front or rear that's the issue).
I accidentally threw a 1g mount in my car once and the motor was just cockeyed enough that it made trying to bolt all the mounts absolutely miserable, until I took it apart and put the correct one in. If not... maybe it is just the billet mounts, but I'd check it.