[TenTec] Argosy mods and serial nrs. question

[tlogan7 at cox.net]

Hi -
There is a great article on the Unofficial TenTec pages about some excellent mods to the original Argosy. It is not clear if any of these mods were incorporated by Ten Tec into the Argosy's beyond a certain serial number (not talking about Argosy II changes). If anyone knows if the factory made changes after a certain serial number, could you let me know what the serial number is or any related history here? Thank you. 73/Tim