I am sure they built a lot more then 120 a day?
Los factory was making multiple car lines mixed in with Camaro’s so they produced a lot less. However Norwood was a full camaro line and produced a lot more then 120 Camaro’s a day.
I believe it’s not that uncommon to have body numbers out of sequence from vin...sometime there could be issues with getting certain parts....although 42,047 does seem like a lot.