I was looking into the PSC box and that way I have the option to do it later. I have the superlift 10" system on 40's. Is the superlift steering front end good enough to where I just have to do the ram assist or do I need to swap it all out for a cross over steering? Never owned a truck this tall or a diesel before so forgive the ignorance.
I would call PSC and talk to the owner Charlie, I think is his name. He's a real nice guy to talk to and very helpful as well. At minimum you'll come away with all the info you need to make a decision and or your options along with the cost. I did the Saginaw conversion kit about 10 yrs ago, and although it helped with my steering, it struggles to turn my Mickey Thompson's 325x65x18's from a stopped position. I'm sharing this with you because I don't want you to think that you could do just a saginaw kit and be good to go.
Where the PSC Saginaw kit made a huge difference, is when I'm driving down the road. My steering is much more sensitive, tighter and responsive. Might be worth looking into a High Steering knuckle as Layson mentioned.
Anyhow hope this helps yah out some.