[JLMounce]

I have no first hand experience with changing a sway bar on a GP, but if you look at how the front underpinnings are designed, it's clear that during manufacture, the sway bar is installed, then the control arms. It appears highly unlikely that you would be able to do this install (especially with a larger bar) without dropping one of the control arms out of the way.

If I was inclined the change the sway bar on this car, I'd probably want to do a rebuild on the entire suspension at the same time, unless I knew for sure that the car absolutely did not need it. Considering the work needed to install the sway bar, now is the time to replace bushings, steering components and shocks while you're in there.