The rusty spot is over the rail and I've cut the area out and can see the inside of the rails and they are mint. I'm going to clean them and brush/pour POR15 on the inside before I weld the new section in. I'm going to cut a small 2x2 section out of the top of the passenger side and check to make sure there are no issues on that side also then tig the cuts up and you'll never tell it was cut open. The problem with this patch is the drain plug and stamped recession as well so it would be a little tough to duplicate. I've attached a picture of my 1971 Camaro with a supercharged LS6 TKO 5 speed Currie 9" etc, it makes 562 rwhp and I put 1/4's--roof skin--rear body panel and floors in this car due to the vinyl top.