My battery is in the rear as well The battery charger will have a certain amount of AC ripple (noise) associated with it. Make sure that your engine has a ground strap to the frame. Make sure you twist the pickup coil wire from the distributor to the FITECH throttle body and shield it with a grounded braided steel cover. Route all of the Fitech wires as far possible from any ignition sources this includes the O2 sensor wire. I also ran my my main Fitech positive and negative wired all the way back to the battery. Hope this helps.