Well, went for a road test today with front end changes previously mentioned. No change. Went to the rear suspension. Found the lower link bolts where they attach the front of the lower link arms to the frame rails were way loose. Guess I forgot to tighten them upon initial assembly of the 4 link system ( had it all apart for frame powder coating ). The bushings were still good, so I tightened everything up and took it for another road test. Problem solved!! No more hunting / wandering. Ran it up to 80 and steady as a rock! Please don't tell anybody.