keep the shimmy shock. If you hit a pothole or nice rock, the steering wheel will want to turn really quick..depending on what side of the front tire hits it. If you dont have a firm grib, you will be sorry for taking it off, I say keep it... My Nova had a bad vib up front going about 40mph...I had to replace the tie rods ends. They were worn real bad. If you get to sit in on the next time they balance your tires...look at the tread surface while it is spinning(High speed balance). One tire up front on my toy had a lump on it. That was the problem I had on a vib up front at higher speeds. Jack up your truck and place a jack under the frame. Spin Tire with your hand and see if they are nice and round. while the truck is up. See if you can get a friend to wiggle the tire vertically and horizontaly while you look at the tie rods, pitman arm, ball joints, etc. On your shimmy shock after removing the side where the small shaft is connected to. pull and push it in and out. If you can do that without much or little effort it is toast...replace it. Just a few Ideas that I would say to check over.