These are some diagrams someone posted on another forum, sorry about the "off-brand" car.
There is some debate on the very rear brace between the bumper supports (often a tow hitch is used). Some say it's worth it, some say it's better to leave the car a little "loose" in the back. I honestly don't know either way, I've never raced one of these cars.
Well the big thing here is (my theory anyway) that it triangulates the front end. Remember that a triangle is the strongest shape in that it can't be bent or distorted. Ever take a bridge building class in high school?
Now granted, the braces here don't form a true triangle since there's two sepatrated mounting points under the engine cradle. But it's gotta be better than nothing. My plan is to shorten the cross bar under the radiator, move it inwards, and weld it to the other two bars like this:
And in addition to that, cut a smallish triangle out of flat steel and weld it between the two towards the point under the engine cradle, forming a true solid triangle. That should make it all a lot stronger than as-installed by the factory, without the extra weight and cost of having aftermarket ones made out of heavier gauge tubing. And FWIW, I paid about $15 for these three pieces at the U-pullit yard. Will it work? I really can't imagine why it wouldn't.