Chassis Component identification

[andsonsvd]

Hi Everyone,

Just wanted to thank everyone in advance again for all of the help you guys give it is greatly appreciated.

I put the rear wheels on the dually today, and I had a couple of questions on chassis parts as I don't know what they are for.

The first one is the two brackets on each side of the rear section of the chassis, that is directly above the rear springs. I assume they are some type of mount for the tray?

The Second photo is some type of hinge bracket that is on the back side of a chassis cross member, facing the back of the truck.

The other question I have is In regards to rust repair panels.

I have three I need to do, the Outer Cowl, Inner Cowl and rear Lower Cab Section. I was just wanting to get your opinion on installing these myself?

I can weld ok, but not expert. Im concerned in damaging the body, Or should I just pay someone to install these patch panels?

Thanks Shane