I currently have a 1982 Bonneville with what I thought was a 4.1L V6. The man that sold it to me even said it had the 4.1L in it, so a friend decoded the VIN an it plainly says when it was built it had a 4.1L in it. I'm currently changing oil pan gasket an I found the engine stamp. It says 3.8L. Is it possible that the 4.1L was swapped? I'm the third owner too by the way.