Awesome thanks for all the replies everyone!! I think for now I am gonna just box in the control arms and leave the 7.5" rear end in the car. I am sure down the road I am going to swap in a 9" or maybe even the 8.8" to handle a little bit more power reliably. I will post before and after pics of the control arms when I can get all the snow out of my way to unbolt them.
What thickness steel should I use?