run them alond the sides of the car where the door stills are (little plastic trim pieces on the floor that cover where the carpet ends and the door closes). pop these off, they're just held on by clips. then, pull the carpet up & run them from there. the passenger side is the best for power wires, and run your RCA's on the driver's side to avoid alternator squeal. The only places I could find to run wires through ( I relocated my Batt. to the trunk, so I have 2 big ass 0-gague wires running through here) is in the passenger side of the firewall, just above where the ECU mounting cage sits, and under the a/c box under the dash. I had to drill 2 seperate holes, it is very tight, and right next to a hure wiring harness.