Installing MSD6AL
This here is from the 73 manual In this diagram, NOT on your car (the resistor may be positioned differently, you want the bottom right, J3 at the ballast, you want either of the two jumpered ones on the other end, and jumper those together. Disconnect BOTH wires AND THE cap and tach, if connected from the coil. Take the coil + wire and connec that to your small red MSD power trigger wire
NO the brown wire on the right side DOES NOT go to the distributor. The "run" wire IS the "switched" power. But there is more to it. One n wire terminating at one of the ballast terminals comes in from the key in the start position, and provides 12V to the coil ONLY in start.
This here is from the 73 manual In this diagram, NOT on your car (the resistor may be positioned differently, you want the bottom right, J3 at the ballast, you want either of the two jumpered ones on the other end, and jumper those together. Disconnect BOTH wires AND THE cap and tach, if connected from the coil. Take the coil + wire and connec that to your small red MSD power trigger wire