in the midst of the same project on my 99 LC. I pulled the tire, jacked it up pretty high, and was able to get a ratchet style hand wrench in there. The bolts then proceeded to start to disinegrate under the wrench and my fingers. 17 years of AC condensation has turned that bracket and bolts into shale like rust.
That bracket that is welded to the frame is in bad shape too.
Heading to my buddies house tonight who has dremel cutting tools and a nice tapping set to remove the screws. Going to take out the entire from ASB assembly and see if i can deal with no sway bar in the front. I only drive it around 4-5k miles a year. Not like im racing around corners in it anyways or blasting down the highway.
If i hate it then I'll have to get a new bracket welded on via a fabrication shop and then rebuild the ASB with all new parts.