If you are feeling brave, you may want to add the igniters. One was installed in the filler cap and second was installed on the aft left side with a support bracket tack welded to the outside of the tank. The igniters had safety wires run back to the pylon that activated the igniter when the tank was released.
Early in the war there was a shortage of igniters and the weapons personnel devised a uniuque solution. They only installed the aft igniter and a standard filler cap was used on the nose. It was left slightly loose to allow the napalm to ooze out and coat the nose. The wing guns were armed with tracers. On the attack run, the pilot would fire his guns and the tracers would usually ignite the napalm. If that failed or the airflow blew the flames out, the pilot would make a second run firing his guns into the impact area of the napalm tank. Needless to say flying with flaming tanks under thier wings was not a favourite tactic of the pilots.
The picture below is the configuration used for a long range mission, often used when flying from Japan for strike missions around the Pusan Perimeter early in the war. A 150 gal fuel tank on one wing and a napalm tank on the other.
View attachment 185835
Cheers,
RichB