Hi guys, under the dash is a lot of room to mount the unit. Once the old heater is out you can fabricate brackets as well as bolt it through the firewall. As far as the glovebox is concerned you can shorten it up or utilize the space for whatever ( I park my gps unit in the space when not in use) I put magnets on the back of the gps and stick it to the back of the glovebox door. I also have the connection for my satellite radio in the space.
Joe Trav