So I have bare truck frame that I plan on boxing in for added strength. Before I start anything though I want to make sure everything is lined up. I’ve done the plumb bob check. What else do I need to do to make sure the frame isn’t out of alignment? I think it may be out some because I’ve always noticed the bed on the truck not sitting flat and level when the truck was still put together, but the bed doesn’t look like it warped or anything. But I’ve never noticed anything else besides that.