Installing MSD6AL

Dillon Crowell said

It’s a 74 valiant.so the blue wire coming in is the run, which wire is the switched power? The brown wire on the right side goes to the distributor. Which is the coil+wire?

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Can't you check continuity of a length of wire? Disconnect all 4. Disconnect the coil + (and the coil -) On the end of the ballast where the two wires are NOT jumpered, ONE of them goes to the coil (HINT!!!! will be the same color!!!) and the other goes to the ECU. Disconnect the ECU. That wire now will not go anywhere and you can check continuity to ground and anywhere else and it will be open.

So check the coil wire, and hook that ballast terminal to either of the ones that are jumpered, and that is all you need to do. You can even buy some male spade/ flag terminals, and just make a little jumper wire