I heard there were differences between 67 and 68 grill parts. Leave it to me to figure it out the hard way. I spent the better part of two days restoring my passenger side grill only to find out the NOS headlight doors wont work. The center studs are spaced about an 1-1/2" different. The good news is, I found out while cleaning everything that I have two sets of FoMoCo headlights. :beer:
http://s109.photobucket.com/albums/n71/jandmmiller84/Headlights/
http://s109.photobucket.com/albums/n71/jandmmiller84/Headlights/