I have had a boosted steering setup on my truck for some 8 years now. Originally it was to handle the huge tires I was running. While backing up with the trailer, you couldn't get the front wheels to move. With the assist, no issues in that regard.
However, the steering is a little sluggish. I never upgraded the pump to make up for the additional demand. So I can run out of steering power on quick steering movements.
My steering box is tapped to accept hydraulic lines to an assist cylinder. The assist cylinder replaces the stock steering dampener.
I did some custom mounts on the center link and front cross member to make sure the loads on the link were centered.
Really, it wasn't a difficult project.