Will be installing torque boxes and frame connectors on my RR. The K-member and rear axle will be removed forthe restoration process. Should thes be welded on with the cars weight is on all fours or can I do it with the K member and rear end removed? I thought someone said that the body might "tweak" if the weight is off. Want to do this right the first time. So, I was going to weld these in when the car goes to the body shop.