I have a old 1950s truck tailgate which measures 49 3/4 inches wide and 24 inches tall. I want to turn into a bench that will fold up and down that will mount to a wall. The wall has standard 2x4 16 inch spacing studs. I have put together a picture of how I am thinking of doing this. My idea was using 2 side supports along with a bottom footer that would attach to the wall using 4 3/8 inch lag screws and 3 along the bottom. The side supports would be made by gluing together a 3.5 inch wide x 24 inch and 2.5 inch wide x 24 hard maple. I would place the lag screws on the 3.5 inch wide portion so that the screws will be hidden when the tailgate is in the up position. I believe this should hold but I keep talking myself out of it. I also was concerned of the eye hook plate for holding the chain to the tailgate will be taking a large portion of the load as well it would be about 2 inches big with 4 screws holding them in place
edit: The intended use of this is to be a seating bench.