I just purchased a "rolling chassis" from a 82 Blazer so the guy said. But I think it's newer.. How can I tell? It had "key word HAD" a heat sheild on it.. and it has a NP261 xfer case on it.. I'm not sure if the 261 was stock for that year.. My original 82 has a cast iron xfer case..Anyone have any idea how to tell what year FRAME I might have.? Thanks for all help. It's better to have it than to not need it, then to need it and not have it. !!!