I happened to think of another thing about the original '70s era hood pins. You actually wanted the pins mounted sideways instead of front to back. At that time, few cars had internal hood releases and you could use little padlocks instead of the pins. Mounting the studs with the holes aligned sideways, you could close the padlocks with the lock facing you, when you stood in front of the car. Otherwise, the lock would have been pointing either toward the center of the hood or off to the side, making it harder to open.