I would try 2 things. 1) notch the cross brace out in that area (see Junstino's last pix); Don't cut the floor sheet metal where your picture says "cut here". Cut the brace underneath it. That should give you at least an inch.2) loosen your trans cross member bolts and shove the trans as far to the passenger side as you can. Unfortunately you may have to drop the trans a couple of inches to give you enough room to flip the arm, or you can just un-nut the arm with the linkage still attached, and disconnect the linkage from the shifter, flip the arm up, add the nut back, then attach it back to the shifter.