I just asked Mike and now I "understand". Every body part must be in place and perfectly aligned and adjusted, with wheels and tires to be used in place, properly inflated and with stance carved in stone with all weight of all parts to be used on the car plus a sandbag of similar weight to a full cooling system and also gas and passenger weights added then mock up brackets must be made to hold the grille shell to be used. Then four people must evaluate the appearance from fifty feet away or more and unanimously approve positions of all areas of the body... then a radiator can be designed.
Why would anyone want that.
Make mine muscle.