Install MSD 6AL Ignition control with FiTech (new to all this!)

That diagram is tough to read

First, with any CDI, (like the MSD) DO NOT hook ANYTHING to the coil except the two wires as shown coming from the CD box

The tach output is generated by the MSD, so refer to the destructions for the MSD, which is at their website.

By ignition, if you are talking about a feed to power up the MSD and EFI, this is a bit of a trick, and you need to understand how your car works "as original."

If you do not have them, go to MyMopar and download (free) service manual and wiring diagrams. The aftermarket wiring diagrams there are somewhat easier to digest than the factory manual sometimes, but they leave out options and sometimes connectors. So refer to the factory shop manual for connectors

Assuming your car was "bone stock" with breaker points ignition, you basically jumper the wires at the ballast resistor together, and pick up the original coil + wire. This now becomes your ignition feed.

HOW THIS WORKS

The ballast and ignition switch work together. There are TWO ignition sources both come from the key

1..."In start" the RUN (IGN1) goes DEAD. The only ignition source in "start" is the (usually brown) IGN2. This originally fed to the coil + end of the ballast, and provided direct battery to the coil for starting. SO THIS MUST BE JUMPERED (by jumpering the ballast wires together) so that you get EFI and MSD to work in "start"

2...In "run" now the ignition (was originally) fed by the usually dark blue. THIS IS THE ONLY switched 12V source under the hood for ignition, alternator field, the regulator, some smog doo dads depending on the year. THIS IS NOT FUSED so be careful