please help : car vibrates heavily

I had a similar problem with my '73 when I got it, found SEVERELY worn idler arm, tie rod ends, and upper control arm bushings on passenger side. Replaced all and have not had the same issue. Symptoms were front of car shaking intermittently at any speed, pulling while breaking, and clunk/clanking sound from front end while breaking, going over bumps, or accelerating. Again, like 68gtxman said, this is very dangerous, and if you are not experienced in this type of work or diagnosis, trailer the car to a shop who is.