Problems after suspension rebuild

I recently replaced upper A arm bushings, lower control bushings, upper and lower ball joints, and strut rod bushings. I had the car aligned at a shop, and now I have vibration at highway speed, and creaking noise when hitting bumps. I suspect the lower control arm and upper A arms were tightened down without being at ride height. Can I fix this by jacking the car up, put it on stands on the frame and let the suspension sag, back off the torsion bars, loosen the LCA nut, upper A arm nuts and strut rod. Place jacks under the LCA and adjust the torsion bars back to where they were, then tighten everything back up?