I was hoping a fast ratio arm would have the desired side-effect of firming up the steering on my PS 'Cuda but the effect on the assist was negligible. Maybe a little. Still over assisted. I swear E-booger had a simple shadetree mod to the box to lessen assist but I don't remember the specifics.
for me it is less about the over assist and more about the precision steering which seems to be lacking in the power steering box.