Tell your nephew to listen to you, his dad, granddad, but most especially, listen to his MOM!
Seriously, it's fun watching them young teens working on something that's theirs. My 13 yo has a '67 step K10. He calls it his sexy truck. HA! Here is him removing the windshield from his original cab:
If there are any parts your nephew needs and we have them, let me know....I'll be glad to save them for him!!