Don't move your exhaust, flip your spring over. I think you have it installed backwards. If you flip it over it will not only sit nicer, but the tapering of the spring will give your exhaust a bit more room.
Here's a picture of a busted strut but you can see the orientation of the spring and perch. My bottom rubber piece is coming up a bit in that picture but the other side was nice and flush. There are holes there to grab the rubber and that end popped out....easily fixed.