Hello all I am going to install a car stereo amp .Where is the best location to install it? , I heard under the seat is good but the amp is not supposed to sit directly on a metal surface? Also I need a location to run the power wire through the firewall. I might still have room where the vacuum lines run through the pass through for the cruise control. I really dont want to drill a hole ,because I'm worried about rain water getting in .Is there another unused area that is plugged specifically for running wires through if needed. I hope I get some good suggestions , thanks , rf64