What is the model engine and outdrive on my 1984 Ciera 2750?

[DaBossDrew]

I know that it is a 260A but the engine schematics show a few. Is it the AQ260A?

[C-ya]

From my limited knowledge of these things, I would say yes, it is a VP AQ260A. Someone who has worked on these things can give some history of the nomenclature. My valve cover says 225D but it is an AQ225D when I am looking for parts.

[DaBossDrew]

Thanks!