The sandwich plate on the Automatic ZXTs has something in it that is internal in the non-turbo or manual turbo car's block.
You need to use it, as you cannot simply replace the stud with the correct one. I believe it has a bypass valve that is otherwise cast in the other blocks.
Search on it, it's been discussed. I got the SAE adapters for mine and just have it looped, I'm waiting to mount the oil cooler till I know what my front end looks like.
Mario