[robnolimit]

OK. EVERYONE should read this. (smart question BTW) The location of the PHR will determine the rear Roll Center. This is easily mapped out. The RC will be in the center of the bar (left to right) and at an elevation equal to the average of the two mounts at Ride Height. had to say it that way to include bent bars. If the bar is straight, it's the center of the bar. There are a couple of basic PHR rules we try to follow.

** Try to keep the bar level (mount to mount) at RH.
** Try to keep the center of the bar in the center of the WMS (Wheel Mount Surface) - or, center of the car/truck.

*** Some adjustments to these rules are commonly made for weight balance and track condition, but let's stay with the basics.

So, What about RC height. ** Lowering the roll center increases the Roll Angle of the chassis. So, a lower RC will increase body roll. (that's the bad part) BUT, the increased body roll puts more load on the outside tire (good for light back trucks) and may increase traction. (up to a point of diminishing returns) On the other side, raising the RC will reduce body roll, and keep tire loading more even (good if you have even ft/rr weight balance and sticky tires).

I think you would be OK to drop the PHR, but you will need to brace the dropped chassis mount. Please post up some picts when you are done.