Will the door panels off a 1976 Corvette fit 1977 Corvette?

No, door panels from a 1976 Corvette will generally not fit a 1977 Corvette. While they might appear similar at first glance, there were styling and design changes between the 1976 and 1977 model years that affect the door panel fitment. The shapes and mounting points are different enough to prevent direct interchangeability.