My question is about the curved braces that bolt to the body mount "buckets" and the fenders on my 1970 442 W-30. The threaded end of the brace that mounts through the fenders came with two different size diameter washers. They look like black phosphate color. I noticed the washer size difference when I removed the braces to clean / paint them.

I'm just wondering what the right size (diameter) washer should be there.