Idenitfy ECU? and WTB

[Steve Obert]

Does anyone know how to identify the ECU as to what year, engine and trans
it is from?

The acutal part number doesn't appear anywhere on it.  From looking at the
FSM it looks like a GA motor ecu is smaller and the let is on the side
instead of the back.

I have one which has a large 64 on it with the numbers 5ZE164, A11-B20 BZ0
which is from a '91 is this correct?

What would be the markings on a '94 ecu.

Anybody have a '94 ecu they want to sell or trade?