The JZA80 refers to the chassis code that Toyota uses for the Supra. ex: A80 body(MKIV Supra), A70 body(MKIII Supra)
The 2JZ-GE refers to the engine code that Toyota uses, but not just for the Supra. ex: 2JZ engine, 1JZ engine
So what you'll end up buying(hopefully) is a JZA80 Supra with a 2JZ-GE engine in it.
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