I think what he meant was we have no way of knowing how the ignition was wired into a car that wasn't born with it. Essentially, you're asking where the fuse for the MSD 6AL would be on a '67 Dart. Just test the voltage on the power wire with the key in the run position. If you have battery voltage (or near enough) at the hot wire with the key on, and everything's in order inside the distributor, you should have spark. If the ground strap you circled is missing or the module wires are broken, you won't have spark. The module wires often look OK but are broken inside the insulation. The ground strap gets left out by accident.
Chances are if you changed the module to repair a no-spark issue and the new one didn't do it, the module wasn't the problem.
I've never heard of a "shelf life" on an HEI (or any other) module, new or aftermarket. They don't spoil. If it was truly NOS GM--never installed, i.e. no scratches on the terminals before you installed it--it would be rare to get a bad one.