Drove my '67 Satellite 50 miles to the dragstrip today. No issues on the drive there. On my first pass, right after I let off the gas in the shutdown area, I lost all electrical power. I smelled burnt wiring smell and disconnected the battery after I pulled off the track. I checked the battery connections, the connection from the battery stud on the alternator, the starter relay connections, I took the bulkhead connections off and cleaned them with contact cleaner and made sure they had a good connection. The battery is a newer Napa battery and it shows 12.5 volts. I'm stumped any ideas? Thanks!