help!! tailgate and rear bumper install.

[Ghernandez66]

I need a little help.
I recently picked up a rear bumper and a tailgate also ordered new set of brackets since my bumper was one of the big heavy duty ones bolted to the frame I needed the brackets to install the new sport bumper.
I tried installing the bumper with the new brakets and struggled a little since there was no instructions on how to install but I think I got the idea on how it needs to be but ran into an issue when trying to install the brackets on the outside of the frame because the bracket inside don't line up with the hole in the frame it hits the rear brace seems to me that the bed has to be higher like half inch higher. I noticed there's nothing between my bed and my frame I'm wondering if I'm missing something in there all the wood is out at this time so I would like to fix it at this time.

Also on the tailgate I'm wondering if there's any tricks on installing it I had an extra set of hands and tried installing one of the trunions installing that side of the tg and raising the other one installing the trunion on that side and lowering into place but I seem to be scratching the bed and didn't seem to be the right way of doing it .
Any one else with a different trick?

Thanks in advance for your help,