Need some idea's of where to look. Just installed new high steer, with 100% new front end parts {ball joints, hubs, tie rod ends, track bar, tie rod, drag link}. Has a 6 1/2 rough country long arm lift with rear spring packs no blocks, noticed while underneath it that the rear u joint had some movement in the pinion yoke. So I shimmed one of the cups on the inside to take up the .20 thousands, no more movement however it feels like I have picked up a vibration at about 65 or 70 mph. Could that small amount cause that much imbalance? Also just installed new 35" km2's and they took a lot of weight to balance. The tire shop said to put a few miles on them and come back and they would balance with less weight. Rechecked everything on front end and its tight. It also really drives like a dream compared to before the new set up. Steering is like a sports car now. Any input would be great. Thanks