The best way is to remove the bottom bolt and bend it all around until the top breaks then start the new shocks and tighten the nuts at the top through the fenderwell.
You have to replace the entire assembly.
how do you replace the front sway bar likn in a 1999 Grand Marquis?
You take it to autozone and they will show you
it is on the firewall and difficult but not impossible to get to and replace.
For a 1999 Mercury Grand Marquis : ( the engine air filter is Motorcraft FA-1668 )
1991 mercury cougars use shocks and struts
Yes.
( 5 quarts with filter change ) according to the 1999 Mercury Grand Marquis owners manual
According to the 1999 Mercury Grand Marquis Owner Guide : # 16 is a ( 20 amp fuse ) for the cigarette lighter
You can view the 1999 Mercury Grand Marquis owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides
On a 1999 Mercury Grand Marquis : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
Struts on the front , but motorcraft.com lists shocks and struts for the back ( I'm confused ! )