'68 "Spring Special" Inner Plastic Grill detail Tips/results, (cont. from 7/18/18)

There are 3 different spare lengths and part numbers
1 long spares with no gills
2 shorter spare that the front wheel opening molding goes all the way down with the gills
3 a little longer spare that the front wheel opening molding in cut short with the gills
not sure why or there was a design changer through the model year for 2 and 3