I like your custom hinges. Might be just the incentive I need to get a TIG welder . In the meantime, I made some brackets to attach to the deck lid for the hinges to bolt to. I also decided to go with what Jbugs calls a "Ram Air Fan Shroud". There may still be some interference in the center, but there will be far more room for the hinges. Is the box mounted to your firewall some sort of breather device? Love the color or your car.