NH is correct code upper hose.
Lower would be coded NL.
(info from a 1971 Bsheet)
Practically guaranteed a Bsheet on the gas tank of this car.
2Q of 1970 on the plug wires seems like an oddball ordeal.
But I am not doubting them necessarily.
So they were produced between April May June 1970.
Its a Feb 1971 car built at the main plant PMD
Perhaps the engine date codes are extremely early too.
Plug wires go on the engine before the engine leaves final assembly at PMD engine plant.
So if its an early engine - the plug wires would be early too.
As one explanation
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