if you already have a turbo IDI, why are you looking to get a new "brand" turbo set up, and not just upgrade the ATS turbo setup you have?
the 93 and early 94 year model trucks are the only ones that came with the ATS turbo set ups installed from ford, some dealers would install turbos and sell them as turbo idis but most of the time when someone refers to a factory turbo idi they are referring to those built by ford.
My 94 factory turbo idi has a build date of 11/93
Ive installed a wicked wheel II, upgraded the down pipe, and have the exhaust ceramic coated. Im not going to win any drag races, but I get from point A to Point B reliably