1956 Bentleys used 1' square tubing to attach the hinge to, they also had 1 bolt holding the front down. The rear was held down by pulling 2 levers inside of the car, to a latch bracket on the lower sides of the hood.
When my hands are cleaner, I will look through a signed hard copy book, about vintage racing, that was given to me. 'Circle Of Impact' about Bob McCoy. I also think that is a old Bugatti, but I will see if I can verify it.
Awesome build with great picks, and documentary. Keep it coming.