TIP # 1:
DO NOT GO CHEAP ON THE WIRES.
TIP # 2:
GET A CAPACITOR, A RF IF POSSIBLE.
TIP # 3:
Any wire needed to go to the back of the vehicle is always best if ran down the center of the vehicle. Removing the center console and the rear seat are necessary, but you will be happy with the results. I always run my power cable thru a hole near the cluth pedal and then seal around it with some RTV.
TIP # 4:
Do not buy Jensen. (ok, bad joke)