Been running my Toy IFS P/S box since the late 90's. I wheel in rocks, freeway, you name it.
Gotta look at it this way, all the Yoda boys running IFS boxes and I've never heard of them breaking. They are super tough.
Drag link is the key. Back a 15+ years ago there weren't many options, but now you can buy FJ 60 links that are tough as nails.
I used to run mine with the Ford pump, now I'm running it with PSC's hi-volume pump. Works great.