If you find it, I understand it is decoded as last digit of year, plant of manufacture, month.
As example, 5MC would be last year digit 5, M is Motor Wheel company (like Magnum 500) and C is March- third letter for third month.
1967 Galaxie 500 Red original Q code 428
1967 Galaxie 500 White with Black stripes 428PI clone- car is dead & long gone, sold near Oak Ridge TN 2000, would love to find it.....
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