You have an L67, correct? Your year is 1993, correct?
Then you should have a MAF with the calibration ending with -02E. Anything else will cause fueling and intake air errors. Keep in mind the PCM will NOT throw a MAF code, regardless of it being the right one or not, because it does see that it is working.
I put that table together to help people to see what MAF sensors can work for them. I need to update it sometime this week though...more additions to the table.