I have most of the vibration out of my truck--finally. It's a '79 k20 with the 465/205 combination. There is a feeling in the steering wheel of a slight high frequency road vibration at all speeds. If I press on the clutch just enough to take the slack out of the pedal (maybe 2 inches) the vibration stops completely in the steering wheel and is tranmitted into my foot. Then I have a smooth ride. I have a new clutch/pressure plate/throw out bearing. Any ideas will be appreciated.