No, leave it how it is. The weight on the frame is fine. When you have the car on a lift thats where they pick it up from. I wouldnt tighten that bolt untill you have the brake backing plates back on, otherwise you wont be able to get them back on. If you are going to have it torn down for a while, you are fine to leave the torsion bars loose untill you are ready to put it all back together.
