Nice how to, I do have a suggestion that will make them stronger . Use a larger plate on the back, make it wider and longer , this will spread the load out more . on the bed side use the bar the ubolts come with . this will create a sandwich with the bed metal in between the plates , much stronger and less likely to pull out .

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2003 Ranger totally stock for now ,mods coming soon .
SOLD 1996 Mazda B3000