Hey im seeking advice. Im in the process of removing the old c channel and replacing with a new one 3/16. And then bolting everything back together. But im thinking of adding c channel all the way to the cross member and bolting it in. Thinking the inner c channel is 3.5" and 5" after the curve. And then boxing it in after with welder. Should i leave the rear open? Or box the whole thing? And would adding bolts to the bigger 5" part, and wheel arch be ok?