I was just saying how he said way back then the lincoln rode really nice and I didn't think the suspension quality went down from then to now.
The suspension quality didn't go down, the two cars simply ride differently because they're set up with different objectives, just like a live-axle Mustang GT500 rides differently than a live-axle Town Car. There are trade-offs in every design; the LS's suspension traded some "comfort" for better handling.
About the strut thing. Thats what they called them so thats what I call them. So coil over shocks, so there is a coil around the shocks of the ls or this piece is just called coil over shocks and has shocks as well? They said they changed the struts and it made the car a lot more stable.
The LS's springs coil around the shocks, and I believe the lower spring perch is on the shock body. If you don't look at them carefully, they could easily be mistaken for struts, and the incorrect terminology in the Ford parts catalog doesn't help.
FWIW, the difference between shocks and struts is that struts are structural (at least suspension struts are

). If you remove the struts, the car can't go anywhere because you've removed a load-bearing part of the suspension, whereas removing the shocks will primarily affect ride quality--ie, the car can still go, but the ride will be crappy. In the case of the LS, it will be
really crappy, because you'll also be removing the springs, leaving the suspension completely bottomed out, but you could still go somewhere in an emergency (at least in theory; when it's completely bottomed out, the LS's tires may rub).
And whatever they change, what they called "struts" were changed on all four corners
That's what I was trying to get at; from what you said, it wasn't clear if they'd hit all four or if they'd just changed the fronts (which are the ones, IIRC, the Ford parts catalog calls struts).
At any rate, if you're still getting a vibration at speed, get the wheels rebalanced. I'd suggest going to the shop your local street-rodders use; they're usually pretty good judges of quality work.