No spark when cranking

Since this is a '74.... Gotta ask, has all the seat belt interlock crap been removed? It only existed to kill the ignition when you were trying to start the car without buckling up. There are sensors under the front seats that need to be unplugged. They look like a brake light switch with a short pigtail going into the carpet. Pull the pigtails but leave the control box under the hood alone. If you unplug that the starter won't work. Unplugged the seat sensors on my '74 Charger before I drove it off the dealer's lot. The Service Manager put a bug in my ear...