All of the above suggestions that it's time for new springs are spot-on. I just wanted to add a little information regarding the snubber itself. I'm sure you've seen people say "take that off and throw it away" or "you'd be better off losing that 5 pounds"...... Most snubbers are used incorrectly, and are of very little use to a guy with a street car anyway. In order for the snubber to be of any use, it has to be up against or very, very close to the floorboard of the car. That's not good for a street car, no doubt. MaMopar actually called for the Max Wedge cars, which were really designed for competition straight line acceleration, to run the snubber against the floorboard.