Lincoln front end vibration

SOURCE: shaking/vibration in front end & steering wheel

Nor sure about the 2001 model, but on the 97 model, the track bar bolts to the frame on the driver's side. The bolts work loose. Dont merely look at it, go ahead and tighten them. There are two bolts facing upward, at the end lf the track bar. Then there are 3 nuts behind the driver's side front wheel that need to be tight. You dont have to take the wheel off so see them. I tightened all of mine and the death wobble nearly went away ....( 90%)....then I replaced the steering stabilizer ( damper). Hope your 2001 is just as easy !

SOURCE: 98 chevy astro front end vibrates and shakes at 65 mph

BUSHINGS! Your bushings need to be replaced. It is probably worse if you are in a turn at 65mph, too.

SOURCE: front end shakes when accelerating

The desciption you gave is exactly how it feels when you have an axle with a bad inner CV joint. It won't make a "clicking" noise like when you have a bad outer CV joint, but will shake pretty bad on accel. If you crawl under the car while it's on the ground (don't lift it) and grab on to the axle close to the inner CV joint and wiggle it, there shouldn't be very much play in it. If there is play in it, replace that axle.

SOURCE: the front end shakes when i hit the brakes when i

you might wana get the rotors and the tie rods checked. if your rotors need to be turned or replaced it can cause the shaking. the same goes for the tie rods. usually the outer tie rods get damaged after hitting bumps or pot holes at great speeds and cause the tie rod to create a small space between the inner and outer tie rod .

SOURCE: vibration in front end

It is likely both your track bar and the lack of a steering gear box stabilizer. The bushings on your stock track bar can be replaced with polyeurethane or metal bushings which will help curb the problem.
The steering stabilizer attaches to your steering gear box and your frame allowing the steering to be more stable. I have put both on my truck and it drives like a caddy now as a result. If I had to choose between the two items, my money would go to the steering stabilizer first. I believe I bought mine here:
http://www.xtremediesel.com/bd-powerperformancedodgesteeringstabilizer.aspx
Hope this helps