Did you check for 12V at the distributor pink/red wire? Did you verify that when you quickly move the throttle at the carburetor fuel squirts down into the carb.? How did you establish that you have no spark? Is the ticking coming from the starter possibly? What else did you do besides the wiring harness, ie plug wires, remove distributor, etc. Can you describe where the fire was and what was damaged? Pics of fire damage?