I just took the car out of storage for the winter. Put a new one wire alt. on the car.Go to fire up the motor for the first time this year. Starts hard. Flames were shooting out of the carb, but it started and ran great. Went to shut the car off. Turned the ignition key off, the car kept running. Turned the battery disconnect switch of, the car kept running. The only way I could get it to stop running, was to pull the wire out of the HEI. Carb backfires while starting motor and when the motor starts it runs great ,but I can't shut it off. Need you help here guys.