Electrical is gone

Car is a 1972 Dodge Dart Swinger 318 AC and Heater. The engine runs no problems but I have no power to any interior lights, turn signals get no power to even flash once, brake lights don't work, hazards don't work, heater fan doesn't work, no gauge lights, nothin. The bulkhead connectors have been checked and cleaned, all fuses are good, and grill lights turn on as running lights. I'm thinking that its a fusible link somewhere but I checked the ones close to the firewall and they are all good. Where are all of the locations of the fusible links and other possible fuses and does anyone have any other ideas for this problem?

Thanks
Jake