Itza 400, Vincent. The info you see on that tag is a production date, most likely. If the tag still has any blue left on it, it should also say Hydramatic Division, and possibly M40.
The electrical connector is for the kickdown solenoid(passing gear). It may have one, or two terminals on it. The ones with two terminals have them arranged in a "T" shape...one horizontal, and one vertical.
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