There were many differences in the 71 cars to the 74s. It should be easy to see from the outside. Do you have any pictures of the door glass trim, windshield trim, rear taillight panel, deck, front lower valance, front grill, I can keep going. You can clearly see the front valance is missing the marker light pods that were on most of the cars starting in mid 1972 when the US L model car started in production. This car had marker light pod bumpers.
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