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I don't believe you can use the Caprice upper A-arms. You need to go with Hotchkis, Global West, (or whoever else makes them) A-arms specific for the B-body spindle upgrade on the G-body otherwise the camber curve is all out of whack. I just ordered the Global West upper a-arms (superior to the Hotchkis w/poly bushings in my opinion). Unfortunately when I got my order I found out the A-arms are on back order. Also, you don't have to change the tie-rods BUT I would recommend getting the Baer Brakes Baer Tracker tie-rods that are adjustable. This will help remove bump steer caused by the changed suspension geometry.