Tying the rear frame rails together? Opinions please!!!

I am considering this also. I am thinking of adding one right above and behind the rear pinion snubber mount. It will clear everything and should add some stiffness. I had 40 feet of 14 guage steel bent to make 2 halves of a frame rail last year and was going to use some of it in the back. When it is all said and done I think my valiant will be 100 pounds heavier than stock, but all that weight will be down very low and the car will be very stiff.