F3ZF-12A650-FB-MR 130930 - this tells me that the EEC is out of a 1993 Ford. However, while C3W1 is a Reman. code tag, it's not from a Mustang. A3M1 is the code tag for the Mustang reman EEC. The Cobra EEC has a code tag of X3Z.
Also, by all means, stay away from the 88 CA - EEC. It's code tag is LD8. None of the chip companies have the software code for this EEC. So, no custom chip tuning for this EEC.
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TM88GT