Watch your wiring harness. But I think you probably have room if you put the screws in just the right spots. On yours the wiring harness "should" extend straight rearward before turning left at Albuquerque and running across the dash. Don't think you have any wires directly on the back of the firewall. Just insulation?
Best to reach up under there with your hand, behind the glovebox. Just to be sure.
Paul