We learn something cool today. Grill bars come marked from the factory. I dont know how many others were aware of it, but they are. If you look on the right hand back side, near the center, you will see little notches. There are two in the second bar, three in the third bar, and four in the fourth one. These notches are on both the front half and the back half of the bar. The top and bottom bars can only go in one place. Make sense that the factory needed some way to keep it straight at assembly. I've looked at several of our big and little trucks, they all have them. Also did you know there are nearly 140 rivits/bolts that hold a grill together. Isn't any wonder that they went to a differnt grill on the 54 and up. Just thought I would pass this along to the masses.