The eggcrate grille featured on the 1955 cars was widened into a series of rectangles for 1956 .
This subtle exterior change was nothing compared to Ford 's adoption of a 12 - volt electrical system across the line .
The eggcrate grille featured on the 1955 cars was widened into a series of rectangles for 1956 , but this subtle exterior change was nothing compared to Ford 's adoption of a 12 - volt electrical system across the line .