I have a 130 amp powermaster one wire on my 68 fastback, underneath the motor plate, where the stock fuel pump used to be. I have a # 10 wire to the stock mopar battery connection on the starter relay, which is near where the heater motor used to be. It works fine. #2 welding cable from trunk on same post. battery stays charged, doesn`t run down if left for a few weeks, always around 14.2 on the hand held. starts the 505 even when hot. so far so good.
