Chrysler PWR steering

I'm unsure what pressure the ones on the 5.7 hemi's run at (maybe someone here does???)...is there anyway to put in a variable pressure valve in if necessary? More pressure = lighter steering, less pressure = heavier steering I presume. Over pressure I thought may place excess pressure on seals etc causing more potential for leaks further down the track.

I'm unsure what the GM unit I have runs at but I'm sure I could find out.

As long as the output pressure is around the same I'd assume it would be fine...