Videos of the clamshell tailgate that was an available option on 1971-1976 GM B-platform wagons. This feature was discontinued with the introduction of the 1977-1990 GM B-platform wagons, and was replaced by the power drop-down window on the tailgate.
In a later post, I’ll be talking about my idea of the resurrection of the GM B-platform and the reintroduction of this feature on the wagon models.