depends on if your running stock or mod. if you run stock use the springs and not the tplate screws and if you run mod use the tplate screws and not the springs. I cut the tabs off the cross bar that the springs hit on so I can never use the springs again unless I get a new cross bar. one thing I recommend is to get a piece of brass and drill a hole in the center and put it under the tplate screws if you use them. otherwise it cuts into your chassis and with give you different readings on the tweak. i'll get a pic if I can find one.