Not sure where you are at in your assembly process but if you haven't already, go read all the posts by 52Carl on this subject. My opinion is that measuring those angle supports is the wrong place to start. I would read all you can on aligning the front sheet metal and start from the beginning (hood aligned first then everything bolted in super loose, then start moving and tweaking the fenders and grill up from there. If you really get to the place where you think the support needs to be moved you can do it, but I wouldn't start with that.
