I am about to swap out the rear end in my 85 w/ a 84 Monte posi. My questions is, can I use a floor jack to lower the rear and relieve spring tension instead of compressing or binding the rear springs? I assume that the control arms would still attached during this step, shocks removed and drive shaft removed so the rear end would not shoot off the car (or jack). Any advise would help. I hope to be at Joliet Motor Speedway for Race What You Bring Sept. 16th. Thanks.