question about welding bedsides

[Metalaroundstone]

When I took apart the bed of my 66 fleetside, each bedside was welded to the rear cross member in two places. I was planning of re-welding everything in the same way when I put the bed back together. But now that I am putting it together, all nice and shiny, I am questioning whether or not it is necessary to re-weld. Anybody have any experience with leaving off these welds? Does it comprimise the stability of the bed?

Any recommendations to weld or not?

Thanks