they say you will NOT need to do all that cutting and weld in that tube section to install it, that is just how they opted to do it for the car that frame belongs to.
apparently you can use the mounts that are welded to that tube crossmember section and weld them directly to the stock crossmember to install this setup.
you have to cut the hole in the frame to run the steering shaft through it. right now they are using a narrowed pinto rack (i think flaming river). the setup is not available yet and as far as i know there has been no testing with power steering but i would assume if all works out they would eventuially come up with a power setup