Hang the doors so that you have a even gap all the way down the entire length of the rocker,even gap between door and quarter panel and that the door is flush with the quarter with the body lines matching up with one another.Once you achieve this hang the fenders and radiator support,loosely tighten the bolts by hand,concentrate on matching up the body lines and getting the same gap between the door and the fender as you did on the quarter then tighten the upper fender bolts,you most likely need some shims to do this.Now a trick to getting an even gap all the way down the fender from top to bottom is you first need a jack.If the lower part of the fender is wider than the top all you do is put the jack under the frame rail where the first body mount is (not radiator support mount) and jack the car up until you achieve the desired gap then tighten lower bolts.If the lower gap is tighter than the top put the jack under the front of the frame near the radiator support mount and jack up car until you achieve the desired gap then tighten lower bolts.Once you have a good fender to door gap hang and tighten header panel,make sure to line up the body lines and make sure it's flush with the fenders tighten remaining fender bolts.Next hang hood so the gaps are even from side to side and has a even gap between the header panel and the hood,you might want to remove the hood latch to make it easier,you will also need to shift the radiator support left or right to achieve this.Once you have the desired gaps tighten radiator support bolts and reassemble hood latch so the hood stricker hits in the exact middle of the hood latch if not you will have binding and when you pull the hood release it may not want to open.Before you tackle this you might want to make shire all your body mounts are in good shape.Good luck and take your time,ikle.