I have an ABA 16vT in my '85 Cabby, so maybe I can help.
You are going to need a few things to make the ABA block work with the 16v. Do you need a list of the simple components to make the head work with the block? Or are you looking for more in depth info?
Not sure I can help you with the aftermarket rod/piston stuff. But if you need info for fitting the head to the black and such, let me know.