Since I don't have the stock f350 dana 60 ubolts I was wondering the correct diameter. I have the other dimensions I need for the shop in town to make the ubolts. They say they are 5/8" diameter. I don't see how those will work as the bottom plates on the dana 60 are exactly 5/8" diamter holes. Are the stock ubolts 9/16" diameter? That would be my guess. They won't make them until I'm sure I get the exact size. It looks to me like the stock ubolts on my f250 are 9/16". Thank You.