boxing in rear suspension question

[undercoverz-28]

just wondering if anyone has ever done this or heard of anyone boxing in the panhard bar and lower control arms. basically you just weld a strip of metal to close in the current "U" shaped suspension to reinforce it. this idea was ran by me because my current project is to spend as little money as possible to go as fast at possible (i work 3 to 4 days a week as a server and am trying to put myself through school). so if anyone has any info or opinions about this is would be appreciated. thanks.