As I'm sure you figured out, this is what's left of the body mounts that are behind the front tires, and after my lift I will be putting my stock wheels with the 295/70-17 Toyo M/T's on. They would go on before the cutting but would rub bad, and would probably be okay now, but they only had of the tires in stock. So, waiting on a lift and 1 tire. I did try one on the spare mount and it fit. I can't wait to get these big, mean lookin tires on my FJ. They look huge in this picture, but it's because they were closer to the camera than the one on the truck. I can't remember the width, but the heighth is 33.5, and the tread is like an inch deep.
I don't have a lot of detail about this as I left it at my buddy's shop for a couple of hours while he did it. He does excellent work. But, in a nut shell, he cut off the excess, boxed the end back in, ground off any sharp edges, and painted it. Easy peasy
Kathie