Lincolns and the Mercury's are the same. We install alot of the 7" flip units into the crown vics, grand marquis, and once in a while the lincolns. The flip unit hits the large extruded dash lip above it when installed in the factory location and short of shimming it half way out of the dash, it looks stupid. This swap is easy, we usually remove the ac unit, and stereo, cut a 2 inch slit under the factory head unit opening to bring the vac lines and electrical connectors up to the factory stereo spot, pull the stereo connections down to the old AC spot, no extensions necessary. The stereo does indeed fit directly into the AC hole with no mods (as long as you are using a single din size unit with a cage/bendable tabs). The ac unit is a little trickier-we usually canibalize a metra installation kit for the factory location and make the ac unit bolt into it. If you don't want to cut off the factory side tabs that allow it to bolt in, you will have to make a custom surround plate and actually push the ac unit in from the front of the dash, then using self tappers to run it into the metra installation plastic surround behind it. To make a custom surround, we usually just cut some thin MDF or abs plastic blank and wrap it with a piece of scrap vinyl or suede. Whole job takes the installer around an hour or two. Give it a shot though, they are really not that hard...