I received some bushings and clamps form ACS today. Slightly enlarged the holes previously step drilled in left gear tower, inserted snap bushings and pulled the #2 power cable thru. Used an angle attachment to drill a hole in the longeron and secured the big fat wire with a clamp. I ended up with good separation between the wire and the fuel line. Next I will go back along the cable and add a few more clamps. Before I can permanently secure the wire, I need to get a terminal on the firewall end. I will use a marine terminal feed thru connector (on order) to penetrate the firewall .