the grille surround also seems larger on the blue one and there is some difference in the sizes/shapes of the hood ornaments. The headlight sizes may just be smaller on the ones that have used modern ones as part of the customizing so I do not know if that is a factor in the model year differences or not. Which year are the ones in this pic of the six of them? I want to save them but I want to label them correctly and list his name as the builder in the pics' file names. Thanks for any help.