I understand what you guys are saying and it does make sense. But any steering (with the exception of full hydraulic) leverages off the frame. More so with my Superrunner kit as it leverages at the steering box and at the other point at the drop down pivot bracket on the crossmember. I mean you could make a case for not mounting it on the axle housing because it is leveraging against it and pushing it out of position as it tries to push the tires. It's pushing the tire one way while pushing the axle the other.
Yes, it does leverage off the frame. That's why Chevy frames fail near the steering box. Besides that, the normal power steering on pretty much all vehicles is not powerful enough to cause further concern. If it is put into a situation where it's bound up, it pretty much won't move. Not so with hydro assist; it'll just push the whole vehicle over if it has to.
No offense but the second part of your argument doesn't make sense. The most logical & best place to mount it is on the axle housing. It's not pushing the axle housing out of postition, it's just trying to turn the knuckles which are directly connected to the axle housing. Sure, it will push the housing over (which will move the whole truck like I said) if it has to, but that's no problem and NOWHERE NEAR as stressful as having it mounted on the frame.
If you mount the ram to the frame it's trying to push the axle one way and the frame/body
another way. If you mount it to the axle it's basically just trying to turn the knuckles, all the movement is isolated to a point below the suspension and axle mounting points.
I dunno what you're shooting for here but I'd run the Sag pump first. If that doesn't make you happy, mod the pump for more flow
and see how that goes