Hello!!! I am needing some help right now. First of all, the two components I need to hook up are a MSD 6AL ignition box (that uses an MSD coil to provide spark) and an Autometer 5' Shift light Tachometer. In the instructions it says to hook the green wire up to the coil or the tachometer output on the ignition box. It then goes on to say that the warranty is void if you attach the green wire to the coil if you have an electronic ignition box. Sooooo, obviously something must happen to the tach if they don't want you to hook it up to the coil. This leaves me with attaching it to the MSD 6AL. So where is the tachometer output for the tach on this box??? I don't know because I bought the car with the ignition it has but I don't have the instructions, or any paperwork, for the box. Well, I hope someone can help me. THANKS IN ADVANCE!!!