pishta
I know I'm right....
I got some cut dimensions off my '65 "S". The side edges are rolled and the top is rolled so your cuts should include the rolled portion if you are going that route. The distance from the bottom of the bumper bracket hole and the top of the cutout is 2 5/16, add 3/4 of rolled lip and your cut line would be at 3 1/16 from top, get it? Use left bracket bolt as datum "A"