One problem is that the wiring has been modified quite a bit for things like an electric fuel pump, aftermarket distributor and the Hyfire ignition. I have discovered that the ignition box is not getting the 12 volts that it should be with the key in the run position. That along with other items that aren't working but need to be in the run position to work, I am starting to assume that it is the switched power source that is the problem? Could it be the ignition switch? How do I trouble shoot the switched power source? Could it be the starter relay?