power steering gearbox upgrade

[SxvxgeSerg]

so my box is leaking for quite some time now i been topping it off with leak stop fluid and it semi helped still leaks a bit I've tried the method too change the clamps on the hoses didn't help
but looking into purchasing one soon
i have a 06 mega cab 6speed on 37 with i believe is a 6inch lift

https://www.dieselpowerproducts.com/...2500-3500.aspx
I'm looking into that box and im going to need another pitman arm because my truck is lifted

thoughts on what i should purchase?
also looking into getting a high flow pump to change that out too why'll im down there

thanks!