Need Help with bedside???

[SBC]

I started taking my bed apart for a wood conversion. The previous owner decided to tub the rear and went crazy with the welder. The pics show what i ended up with between the rust and welding when taken apart.

Is this going to be a major problem when I start to reassemble everything. It looks pretty bad to me but would appreciate any help from you guys. I am trying to stay away from getting another bed side and have no welding skills at all!

Thanks