Mine has welded tabs on the bottom that bolt directly into the lower radiator support. (You need to drill holes in the radiator support to acheive this.) You can also weld a top brace to go where the hood release area is, to help secure it.
I personally feel the two bottom braces are more than enough, as the radiator will also share support from the intercooler piping. You'll see what I mean next weekend when you take a trip with me.