[hugger6933]

Do one side at a time and you will be fine. Loosen the other side just enough to clear you of any tie ups with the mounting hardware.
In doing one side at a time it insures the sheet metal stays lined up. Now all of that is a mute point[means to not talk about it][not moot witch implies it doesn't matter]if you have the truck all apart and are doing off the frame type work to the truck in this case you would need to measure before some assembly. Say the distance from rocker to frame and like places on the opposite sides. Once everything measures the same distance then you can line up the front sheet metal using a X-out method. Jim