Ian it really depends on how you want to mount the lower radiator support. If you choose the replace the factory piece then you will have to drill out the factory spot welds and weld on the caps, but if you choose to leave in the factory piece then you could simply weld in the bar and landings behind it. As far as stiffening up the body goes, XV has done testing with similar parts and here is the video. http://www.xvmotorsports.com/media/Chassis Stiffening.wmv I do know the E body guys really like them.
