1991 Ford F-150, 86,000+ miles, 4.9L EFI, 5 Speed, 2 Wheel Dr

I recently bought a used Ford F-150 and am resoring it. It ran fine but I put in a new battery, new cables, cleaned all grounds, new plugs, cap and rotor, new coil, new plug wires. It ran fine for a week and the other day I was starting to drive and it made an electric bzzzt sound and a pop, it sounded like it came from under the hood. I looked at all of the obvious things (battery, cables, wires, starter, etc.) And found nothing. The battery is good, the alternator is good (both were tested), the wires including the fusible links are good. The starter was bad so I replaced it, I also replaced the solenoid and the ignition switch. The fuel pump inertia switch is not thrown. The headlights work but when you turn the key you get nothing, not even the fuel pump "priming" I normally hear. I am at a loss, should I check the ECC? Fuel Pump Relay? Any help would be greatly appreciated.