i dont get what you mean by an OBD 1 conversion. your car IS obd1. with an obd2 connector. aside from the connector its the same ecm as a 1994 car. i know HPTuners has a bin file for a 1995 M5 3.4 camaro. BUT i dont see it in there supported vehicles list. id give them a call. there really helpfull and there software isnt too shabby!
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1998 Firebird:buncha parts thats used to make it go fast..... not so much anymore. 
BAAAAAA!!!!!!
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